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Finding the Fourth Proportional to 12,920.02, 17,829.93 and 7,331.02

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Solution

The fourth proportional to 12,920.02, 17,829.93 and 7,331.02 is: 10,116.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.02 : 17,829.93 = 7,331.02 : x
  2. Step 2: Convert to fraction form
    12,920.02/17,829.93 = 7,331.02/x
  3. Step 3: Cross multiply
    12,920.02x = 17,829.93 × 7,331.02
  4. Step 4: Simplify right side
    12,920.02x = 130,711,573.43
  5. Step 5: Solve for x
    x = 130,711,573.43/12,920.02
  6. Step 6: Final answer
    x = 10,116.98

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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.