Home / 20,965.46-31,420.40-15,392.76

Finding the Fourth Proportional to 20,965.46, 31,420.40 and 15,392.76

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Solution

The fourth proportional to 20,965.46, 31,420.40 and 15,392.76 is: 23,068.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.46 : 31,420.40 = 15,392.76 : x
  2. Step 2: Convert to fraction form
    20,965.46/31,420.40 = 15,392.76/x
  3. Step 3: Cross multiply
    20,965.46x = 31,420.40 × 15,392.76
  4. Step 4: Simplify right side
    20,965.46x = 483,646,676.30
  5. Step 5: Solve for x
    x = 483,646,676.30/20,965.46
  6. Step 6: Final answer
    x = 23,068.74

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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.