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Finding the Fourth Proportional to 47,038.60, 70,557.02 and 18,957.90

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Solution

The fourth proportional to 47,038.60, 70,557.02 and 18,957.90 is: 28,436.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,038.60 : 70,557.02 = 18,957.90 : x
  2. Step 2: Convert to fraction form
    47,038.60/70,557.02 = 18,957.90/x
  3. Step 3: Cross multiply
    47,038.60x = 70,557.02 × 18,957.90
  4. Step 4: Simplify right side
    47,038.60x = 1,337,612,929.46
  5. Step 5: Solve for x
    x = 1,337,612,929.46/47,038.60
  6. Step 6: Final answer
    x = 28,436.50

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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.