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Finding the Fourth Proportional to 15,502.08, 21,390.72 and 9,213.12

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Solution

The fourth proportional to 15,502.08, 21,390.72 and 9,213.12 is: 12,712.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,502.08 : 21,390.72 = 9,213.12 : x
  2. Step 2: Convert to fraction form
    15,502.08/21,390.72 = 9,213.12/x
  3. Step 3: Cross multiply
    15,502.08x = 21,390.72 × 9,213.12
  4. Step 4: Simplify right side
    15,502.08x = 197,075,270.25
  5. Step 5: Solve for x
    x = 197,075,270.25/15,502.08
  6. Step 6: Final answer
    x = 12,712.83

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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.