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Finding the Fourth Proportional to 15,887.78, 21,926.05 and 9,602.18

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Solution

The fourth proportional to 15,887.78, 21,926.05 and 9,602.18 is: 13,251.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,887.78 : 21,926.05 = 9,602.18 : x
  2. Step 2: Convert to fraction form
    15,887.78/21,926.05 = 9,602.18/x
  3. Step 3: Cross multiply
    15,887.78x = 21,926.05 × 9,602.18
  4. Step 4: Simplify right side
    15,887.78x = 210,537,827.38
  5. Step 5: Solve for x
    x = 210,537,827.38/15,887.78
  6. Step 6: Final answer
    x = 13,251.56

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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.