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Finding the Fourth Proportional to 28,707, 42,906.47 and 25,889.40

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Solution

The fourth proportional to 28,707, 42,906.47 and 25,889.40 is: 38,695.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,707 : 42,906.47 = 25,889.40 : x
  2. Step 2: Convert to fraction form
    28,707/42,906.47 = 25,889.40/x
  3. Step 3: Cross multiply
    28,707x = 42,906.47 × 25,889.40
  4. Step 4: Simplify right side
    28,707x = 1,110,822,764.42
  5. Step 5: Solve for x
    x = 1,110,822,764.42/28,707
  6. Step 6: Final answer
    x = 38,695.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.