Home / 31,127.12-42,956.16-16,981.28

Finding the Fourth Proportional to 31,127.12, 42,956.16 and 16,981.28

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Solution

The fourth proportional to 31,127.12, 42,956.16 and 16,981.28 is: 23,434.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,127.12 : 42,956.16 = 16,981.28 : x
  2. Step 2: Convert to fraction form
    31,127.12/42,956.16 = 16,981.28/x
  3. Step 3: Cross multiply
    31,127.12x = 42,956.16 × 16,981.28
  4. Step 4: Simplify right side
    31,127.12x = 729,450,580.68
  5. Step 5: Solve for x
    x = 729,450,580.68/31,127.12
  6. Step 6: Final answer
    x = 23,434.57

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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.