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Finding the Fourth Proportional to 10,191.40, 15,279.90 and 4,647.40

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Solution

The fourth proportional to 10,191.40, 15,279.90 and 4,647.40 is: 6,967.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,191.40 : 15,279.90 = 4,647.40 : x
  2. Step 2: Convert to fraction form
    10,191.40/15,279.90 = 4,647.40/x
  3. Step 3: Cross multiply
    10,191.40x = 15,279.90 × 4,647.40
  4. Step 4: Simplify right side
    10,191.40x = 71,011,807.26
  5. Step 5: Solve for x
    x = 71,011,807.26/10,191.40
  6. Step 6: Final answer
    x = 6,967.82

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1.5x scale

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.