Home / 21,288.96-31,937.28-8,977.92

Finding the Fourth Proportional to 21,288.96, 31,937.28 and 8,977.92

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Solution

The fourth proportional to 21,288.96, 31,937.28 and 8,977.92 is: 13,468.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.96 : 31,937.28 = 8,977.92 : x
  2. Step 2: Convert to fraction form
    21,288.96/31,937.28 = 8,977.92/x
  3. Step 3: Cross multiply
    21,288.96x = 31,937.28 × 8,977.92
  4. Step 4: Simplify right side
    21,288.96x = 286,730,344.86
  5. Step 5: Solve for x
    x = 286,730,344.86/21,288.96
  6. Step 6: Final answer
    x = 13,468.50

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1.5x scale

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.