Home / 31,581.28-47,354.48-12,856.50

Finding the Fourth Proportional to 31,581.28, 47,354.48 and 12,856.50

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Solution

The fourth proportional to 31,581.28, 47,354.48 and 12,856.50 is: 19,277.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,581.28 : 47,354.48 = 12,856.50 : x
  2. Step 2: Convert to fraction form
    31,581.28/47,354.48 = 12,856.50/x
  3. Step 3: Cross multiply
    31,581.28x = 47,354.48 × 12,856.50
  4. Step 4: Simplify right side
    31,581.28x = 608,812,872.12
  5. Step 5: Solve for x
    x = 608,812,872.12/31,581.28
  6. Step 6: Final answer
    x = 19,277.65

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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.