Home / 15,309.84-21,122.12-9,645.10

Finding the Fourth Proportional to 15,309.84, 21,122.12 and 9,645.10

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Solution

The fourth proportional to 15,309.84, 21,122.12 and 9,645.10 is: 13,306.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.84 : 21,122.12 = 9,645.10 : x
  2. Step 2: Convert to fraction form
    15,309.84/21,122.12 = 9,645.10/x
  3. Step 3: Cross multiply
    15,309.84x = 21,122.12 × 9,645.10
  4. Step 4: Simplify right side
    15,309.84x = 203,724,959.61
  5. Step 5: Solve for x
    x = 203,724,959.61/15,309.84
  6. Step 6: Final answer
    x = 13,306.80

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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.