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Finding the Fourth Proportional to 7,045.04, 9,720.60 and 5,278.16

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Solution

The fourth proportional to 7,045.04, 9,720.60 and 5,278.16 is: 7,282.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,045.04 : 9,720.60 = 5,278.16 : x
  2. Step 2: Convert to fraction form
    7,045.04/9,720.60 = 5,278.16/x
  3. Step 3: Cross multiply
    7,045.04x = 9,720.60 × 5,278.16
  4. Step 4: Simplify right side
    7,045.04x = 51,306,882.10
  5. Step 5: Solve for x
    x = 51,306,882.10/7,045.04
  6. Step 6: Final answer
    x = 7,282.70

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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.