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Finding the Fourth Proportional to 28,164.62, 38,866.57 and 15,417.47

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Solution

The fourth proportional to 28,164.62, 38,866.57 and 15,417.47 is: 21,275.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,164.62 : 38,866.57 = 15,417.47 : x
  2. Step 2: Convert to fraction form
    28,164.62/38,866.57 = 15,417.47/x
  3. Step 3: Cross multiply
    28,164.62x = 38,866.57 × 15,417.47
  4. Step 4: Simplify right side
    28,164.62x = 599,223,944.10
  5. Step 5: Solve for x
    x = 599,223,944.10/28,164.62
  6. Step 6: Final answer
    x = 21,275.77

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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.