Home / 30,605.76-42,228.16-18,668.32

Finding the Fourth Proportional to 30,605.76, 42,228.16 and 18,668.32

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Solution

The fourth proportional to 30,605.76, 42,228.16 and 18,668.32 is: 25,757.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,605.76 : 42,228.16 = 18,668.32 : x
  2. Step 2: Convert to fraction form
    30,605.76/42,228.16 = 18,668.32/x
  3. Step 3: Cross multiply
    30,605.76x = 42,228.16 × 18,668.32
  4. Step 4: Simplify right side
    30,605.76x = 788,328,803.89
  5. Step 5: Solve for x
    x = 788,328,803.89/30,605.76
  6. Step 6: Final answer
    x = 25,757.53

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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.