Home / 15,615.69-21,543.12-10,239.42

Finding the Fourth Proportional to 15,615.69, 21,543.12 and 10,239.42

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Solution

The fourth proportional to 15,615.69, 21,543.12 and 10,239.42 is: 14,126.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,615.69 : 21,543.12 = 10,239.42 : x
  2. Step 2: Convert to fraction form
    15,615.69/21,543.12 = 10,239.42/x
  3. Step 3: Cross multiply
    15,615.69x = 21,543.12 × 10,239.42
  4. Step 4: Simplify right side
    15,615.69x = 220,589,053.79
  5. Step 5: Solve for x
    x = 220,589,053.79/15,615.69
  6. Step 6: Final answer
    x = 14,126.12

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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.