Home / 12,972.61-17,900.90-7,307.20

Finding the Fourth Proportional to 12,972.61, 17,900.90 and 7,307.20

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Solution

The fourth proportional to 12,972.61, 17,900.90 and 7,307.20 is: 10,083.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,972.61 : 17,900.90 = 7,307.20 : x
  2. Step 2: Convert to fraction form
    12,972.61/17,900.90 = 7,307.20/x
  3. Step 3: Cross multiply
    12,972.61x = 17,900.90 × 7,307.20
  4. Step 4: Simplify right side
    12,972.61x = 130,805,366.98
  5. Step 5: Solve for x
    x = 130,805,366.98/12,972.61
  6. Step 6: Final answer
    x = 10,083.20

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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.