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Finding the Fourth Proportional to 15,477.57, 21,355.50 and 8,761.74

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Solution

The fourth proportional to 15,477.57, 21,355.50 and 8,761.74 is: 12,089.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,477.57 : 21,355.50 = 8,761.74 : x
  2. Step 2: Convert to fraction form
    15,477.57/21,355.50 = 8,761.74/x
  3. Step 3: Cross multiply
    15,477.57x = 21,355.50 × 8,761.74
  4. Step 4: Simplify right side
    15,477.57x = 187,111,338.57
  5. Step 5: Solve for x
    x = 187,111,338.57/15,477.57
  6. Step 6: Final answer
    x = 12,089.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.