Home / 30,954.54-42,718.14-18,208.65

Finding the Fourth Proportional to 30,954.54, 42,718.14 and 18,208.65

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Solution

The fourth proportional to 30,954.54, 42,718.14 and 18,208.65 is: 25,128.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,954.54 : 42,718.14 = 18,208.65 : x
  2. Step 2: Convert to fraction form
    30,954.54/42,718.14 = 18,208.65/x
  3. Step 3: Cross multiply
    30,954.54x = 42,718.14 × 18,208.65
  4. Step 4: Simplify right side
    30,954.54x = 777,839,659.91
  5. Step 5: Solve for x
    x = 777,839,659.91/30,954.54
  6. Step 6: Final answer
    x = 25,128.45

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Half scale
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Double scale
Find fourth proportional to 30,955.54, 42,719.52 and 18,209.65
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.