Home / 15,439.94-21,306.86-9,387.99

Finding the Fourth Proportional to 15,439.94, 21,306.86 and 9,387.99

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Solution

The fourth proportional to 15,439.94, 21,306.86 and 9,387.99 is: 12,955.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,439.94 : 21,306.86 = 9,387.99 : x
  2. Step 2: Convert to fraction form
    15,439.94/21,306.86 = 9,387.99/x
  3. Step 3: Cross multiply
    15,439.94x = 21,306.86 × 9,387.99
  4. Step 4: Simplify right side
    15,439.94x = 200,028,541.67
  5. Step 5: Solve for x
    x = 200,028,541.67/15,439.94
  6. Step 6: Final answer
    x = 12,955.26

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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.