Home / 12,139.79-16,728.27-9,307.22

Finding the Fourth Proportional to 12,139.79, 16,728.27 and 9,307.22

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Solution

The fourth proportional to 12,139.79, 16,728.27 and 9,307.22 is: 12,825.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.79 : 16,728.27 = 9,307.22 : x
  2. Step 2: Convert to fraction form
    12,139.79/16,728.27 = 9,307.22/x
  3. Step 3: Cross multiply
    12,139.79x = 16,728.27 × 9,307.22
  4. Step 4: Simplify right side
    12,139.79x = 155,693,689.11
  5. Step 5: Solve for x
    x = 155,693,689.11/12,139.79
  6. Step 6: Final answer
    x = 12,825.07

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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.