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Finding the Fourth Proportional to 8,700.40, 12,005.67 and 5,343.40

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Solution

The fourth proportional to 8,700.40, 12,005.67 and 5,343.40 is: 7,373.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.40 : 12,005.67 = 5,343.40 : x
  2. Step 2: Convert to fraction form
    8,700.40/12,005.67 = 5,343.40/x
  3. Step 3: Cross multiply
    8,700.40x = 12,005.67 × 5,343.40
  4. Step 4: Simplify right side
    8,700.40x = 64,151,097.08
  5. Step 5: Solve for x
    x = 64,151,097.08/8,700.40
  6. Step 6: Final answer
    x = 7,373.35

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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.