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Finding the Fourth Proportional to 15,889.71, 23,830 and 6,402

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Solution

The fourth proportional to 15,889.71, 23,830 and 6,402 is: 9,601.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,889.71 : 23,830 = 6,402 : x
  2. Step 2: Convert to fraction form
    15,889.71/23,830 = 6,402/x
  3. Step 3: Cross multiply
    15,889.71x = 23,830 × 6,402
  4. Step 4: Simplify right side
    15,889.71x = 152,559,660
  5. Step 5: Solve for x
    x = 152,559,660/15,889.71
  6. Step 6: Final answer
    x = 9,601.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.