Home / 30,685.50-42,342.39-17,256.06

Finding the Fourth Proportional to 30,685.50, 42,342.39 and 17,256.06

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Solution

The fourth proportional to 30,685.50, 42,342.39 and 17,256.06 is: 23,811.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,685.50 : 42,342.39 = 17,256.06 : x
  2. Step 2: Convert to fraction form
    30,685.50/42,342.39 = 17,256.06/x
  3. Step 3: Cross multiply
    30,685.50x = 42,342.39 × 17,256.06
  4. Step 4: Simplify right side
    30,685.50x = 730,662,822.38
  5. Step 5: Solve for x
    x = 730,662,822.38/30,685.50
  6. Step 6: Final answer
    x = 23,811.34

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Half scale
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Double scale
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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.