Home / 21,221.08-31,830.78-8,737.66

Finding the Fourth Proportional to 21,221.08, 31,830.78 and 8,737.66

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Solution

The fourth proportional to 21,221.08, 31,830.78 and 8,737.66 is: 13,106.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.08 : 31,830.78 = 8,737.66 : x
  2. Step 2: Convert to fraction form
    21,221.08/31,830.78 = 8,737.66/x
  3. Step 3: Cross multiply
    21,221.08x = 31,830.78 × 8,737.66
  4. Step 4: Simplify right side
    21,221.08x = 278,126,533.17
  5. Step 5: Solve for x
    x = 278,126,533.17/21,221.08
  6. Step 6: Final answer
    x = 13,106.14

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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.