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Finding the Fourth Proportional to 5,387.80, 7,438.62 and 4,856.44

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Solution

The fourth proportional to 5,387.80, 7,438.62 and 4,856.44 is: 6,705.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,387.80 : 7,438.62 = 4,856.44 : x
  2. Step 2: Convert to fraction form
    5,387.80/7,438.62 = 4,856.44/x
  3. Step 3: Cross multiply
    5,387.80x = 7,438.62 × 4,856.44
  4. Step 4: Simplify right side
    5,387.80x = 36,125,211.71
  5. Step 5: Solve for x
    x = 36,125,211.71/5,387.80
  6. Step 6: Final answer
    x = 6,705.00

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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.