Home / 28,221.88-42,319.50-10,440.28

Finding the Fourth Proportional to 28,221.88, 42,319.50 and 10,440.28

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Solution

The fourth proportional to 28,221.88, 42,319.50 and 10,440.28 is: 15,655.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,221.88 : 42,319.50 = 10,440.28 : x
  2. Step 2: Convert to fraction form
    28,221.88/42,319.50 = 10,440.28/x
  3. Step 3: Cross multiply
    28,221.88x = 42,319.50 × 10,440.28
  4. Step 4: Simplify right side
    28,221.88x = 441,827,429.46
  5. Step 5: Solve for x
    x = 441,827,429.46/28,221.88
  6. Step 6: Final answer
    x = 15,655.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.