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Finding the Fourth Proportional to 34,356.92, 47,402.88 and 20,928.56

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Solution

The fourth proportional to 34,356.92, 47,402.88 and 20,928.56 is: 28,875.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,356.92 : 47,402.88 = 20,928.56 : x
  2. Step 2: Convert to fraction form
    34,356.92/47,402.88 = 20,928.56/x
  3. Step 3: Cross multiply
    34,356.92x = 47,402.88 × 20,928.56
  4. Step 4: Simplify right side
    34,356.92x = 992,074,018.25
  5. Step 5: Solve for x
    x = 992,074,018.25/34,356.92
  6. Step 6: Final answer
    x = 28,875.52

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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.