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Finding the Fourth Proportional to 6,648.64, 9,178.62 and 5,153.20

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Solution

The fourth proportional to 6,648.64, 9,178.62 and 5,153.20 is: 7,114.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,648.64 : 9,178.62 = 5,153.20 : x
  2. Step 2: Convert to fraction form
    6,648.64/9,178.62 = 5,153.20/x
  3. Step 3: Cross multiply
    6,648.64x = 9,178.62 × 5,153.20
  4. Step 4: Simplify right side
    6,648.64x = 47,299,264.58
  5. Step 5: Solve for x
    x = 47,299,264.58/6,648.64
  6. Step 6: Final answer
    x = 7,114.13

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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.