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Finding the Fourth Proportional to 28,718.16, 42,985.02 and 15,357.71

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Solution

The fourth proportional to 28,718.16, 42,985.02 and 15,357.71 is: 22,987.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,718.16 : 42,985.02 = 15,357.71 : x
  2. Step 2: Convert to fraction form
    28,718.16/42,985.02 = 15,357.71/x
  3. Step 3: Cross multiply
    28,718.16x = 42,985.02 × 15,357.71
  4. Step 4: Simplify right side
    28,718.16x = 660,151,471.50
  5. Step 5: Solve for x
    x = 660,151,471.50/28,718.16
  6. Step 6: Final answer
    x = 22,987.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.