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Finding the Fourth Proportional to 8,700.40, 13,040.76 and 4,320.88

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Solution

The fourth proportional to 8,700.40, 13,040.76 and 4,320.88 is: 6,476.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.40 : 13,040.76 = 4,320.88 : x
  2. Step 2: Convert to fraction form
    8,700.40/13,040.76 = 4,320.88/x
  3. Step 3: Cross multiply
    8,700.40x = 13,040.76 × 4,320.88
  4. Step 4: Simplify right side
    8,700.40x = 56,347,559.07
  5. Step 5: Solve for x
    x = 56,347,559.07/8,700.40
  6. Step 6: Final answer
    x = 6,476.43

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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.