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Finding the Fourth Proportional to 10,897.70, 15,036.92 and 6,421.10

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Solution

The fourth proportional to 10,897.70, 15,036.92 and 6,421.10 is: 8,859.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,897.70 : 15,036.92 = 6,421.10 : x
  2. Step 2: Convert to fraction form
    10,897.70/15,036.92 = 6,421.10/x
  3. Step 3: Cross multiply
    10,897.70x = 15,036.92 × 6,421.10
  4. Step 4: Simplify right side
    10,897.70x = 96,553,459.72
  5. Step 5: Solve for x
    x = 96,553,459.72/10,897.70
  6. Step 6: Final answer
    x = 8,859.99

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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.