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Finding the Fourth Proportional to 12,720.66, 17,552.24 and 7,681.50

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Solution

The fourth proportional to 12,720.66, 17,552.24 and 7,681.50 is: 10,599.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.66 : 17,552.24 = 7,681.50 : x
  2. Step 2: Convert to fraction form
    12,720.66/17,552.24 = 7,681.50/x
  3. Step 3: Cross multiply
    12,720.66x = 17,552.24 × 7,681.50
  4. Step 4: Simplify right side
    12,720.66x = 134,827,594.64
  5. Step 5: Solve for x
    x = 134,827,594.64/12,720.66
  6. Step 6: Final answer
    x = 10,599.11

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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.