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Finding the Fourth Proportional to 28,135.46, 38,826.46 and 15,560.22

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Solution

The fourth proportional to 28,135.46, 38,826.46 and 15,560.22 is: 21,472.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.46 : 38,826.46 = 15,560.22 : x
  2. Step 2: Convert to fraction form
    28,135.46/38,826.46 = 15,560.22/x
  3. Step 3: Cross multiply
    28,135.46x = 38,826.46 × 15,560.22
  4. Step 4: Simplify right side
    28,135.46x = 604,148,259.42
  5. Step 5: Solve for x
    x = 604,148,259.42/28,135.46
  6. Step 6: Final answer
    x = 21,472.84

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Double scale
Find fourth proportional to 28,136.46, 38,827.84 and 15,561.22
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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.