Home / 28,168.47-38,881.17-16,239.78

Finding the Fourth Proportional to 28,168.47, 38,881.17 and 16,239.78

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Solution

The fourth proportional to 28,168.47, 38,881.17 and 16,239.78 is: 22,415.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,168.47 : 38,881.17 = 16,239.78 : x
  2. Step 2: Convert to fraction form
    28,168.47/38,881.17 = 16,239.78/x
  3. Step 3: Cross multiply
    28,168.47x = 38,881.17 × 16,239.78
  4. Step 4: Simplify right side
    28,168.47x = 631,421,646.94
  5. Step 5: Solve for x
    x = 631,421,646.94/28,168.47
  6. Step 6: Final answer
    x = 22,415.90

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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.