Home / 15,721.61-21,704.78-10,423.59

Finding the Fourth Proportional to 15,721.61, 21,704.78 and 10,423.59

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Solution

The fourth proportional to 15,721.61, 21,704.78 and 10,423.59 is: 14,390.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.61 : 21,704.78 = 10,423.59 : x
  2. Step 2: Convert to fraction form
    15,721.61/21,704.78 = 10,423.59/x
  3. Step 3: Cross multiply
    15,721.61x = 21,704.78 × 10,423.59
  4. Step 4: Simplify right side
    15,721.61x = 226,241,675.64
  5. Step 5: Solve for x
    x = 226,241,675.64/15,721.61
  6. Step 6: Final answer
    x = 14,390.49

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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.