Home / 30,959.01-42,697.13-20,885.85

Finding the Fourth Proportional to 30,959.01, 42,697.13 and 20,885.85

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Solution

The fourth proportional to 30,959.01, 42,697.13 and 20,885.85 is: 28,804.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,959.01 : 42,697.13 = 20,885.85 : x
  2. Step 2: Convert to fraction form
    30,959.01/42,697.13 = 20,885.85/x
  3. Step 3: Cross multiply
    30,959.01x = 42,697.13 × 20,885.85
  4. Step 4: Simplify right side
    30,959.01x = 891,765,748.18
  5. Step 5: Solve for x
    x = 891,765,748.18/30,959.01
  6. Step 6: Final answer
    x = 28,804.72

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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.