Home / 30,967.47-42,752.82-20,387.85

Finding the Fourth Proportional to 30,967.47, 42,752.82 and 20,387.85

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Solution

The fourth proportional to 30,967.47, 42,752.82 and 20,387.85 is: 28,146.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,967.47 : 42,752.82 = 20,387.85 : x
  2. Step 2: Convert to fraction form
    30,967.47/42,752.82 = 20,387.85/x
  3. Step 3: Cross multiply
    30,967.47x = 42,752.82 × 20,387.85
  4. Step 4: Simplify right side
    30,967.47x = 871,638,081.24
  5. Step 5: Solve for x
    x = 871,638,081.24/30,967.47
  6. Step 6: Final answer
    x = 28,146.89

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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.