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Finding the Fourth Proportional to 15,484.60, 21,368.98 and 8,411.16

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Solution

The fourth proportional to 15,484.60, 21,368.98 and 8,411.16 is: 11,607.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,484.60 : 21,368.98 = 8,411.16 : x
  2. Step 2: Convert to fraction form
    15,484.60/21,368.98 = 8,411.16/x
  3. Step 3: Cross multiply
    15,484.60x = 21,368.98 × 8,411.16
  4. Step 4: Simplify right side
    15,484.60x = 179,737,909.82
  5. Step 5: Solve for x
    x = 179,737,909.82/15,484.60
  6. Step 6: Final answer
    x = 11,607.53

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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.