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Finding the Fourth Proportional to 7,152.56, 9,870.44 and 4,008.72

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Solution

The fourth proportional to 7,152.56, 9,870.44 and 4,008.72 is: 5,531.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,152.56 : 9,870.44 = 4,008.72 : x
  2. Step 2: Convert to fraction form
    7,152.56/9,870.44 = 4,008.72/x
  3. Step 3: Cross multiply
    7,152.56x = 9,870.44 × 4,008.72
  4. Step 4: Simplify right side
    7,152.56x = 39,567,830.24
  5. Step 5: Solve for x
    x = 39,567,830.24/7,152.56
  6. Step 6: Final answer
    x = 5,531.98

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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.