Home / 31,127.70-42,956.40-16,980.66

Finding the Fourth Proportional to 31,127.70, 42,956.40 and 16,980.66

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Solution

The fourth proportional to 31,127.70, 42,956.40 and 16,980.66 is: 23,433.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,127.70 : 42,956.40 = 16,980.66 : x
  2. Step 2: Convert to fraction form
    31,127.70/42,956.40 = 16,980.66/x
  3. Step 3: Cross multiply
    31,127.70x = 42,956.40 × 16,980.66
  4. Step 4: Simplify right side
    31,127.70x = 729,428,023.22
  5. Step 5: Solve for x
    x = 729,428,023.22/31,127.70
  6. Step 6: Final answer
    x = 23,433.41

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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.