Home / 47,488.12-71,232.18-12,430.78

Finding the Fourth Proportional to 47,488.12, 71,232.18 and 12,430.78

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Solution

The fourth proportional to 47,488.12, 71,232.18 and 12,430.78 is: 18,646.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,488.12 : 71,232.18 = 12,430.78 : x
  2. Step 2: Convert to fraction form
    47,488.12/71,232.18 = 12,430.78/x
  3. Step 3: Cross multiply
    47,488.12x = 71,232.18 × 12,430.78
  4. Step 4: Simplify right side
    47,488.12x = 885,471,558.50
  5. Step 5: Solve for x
    x = 885,471,558.50/47,488.12
  6. Step 6: Final answer
    x = 18,646.17

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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.