Home / 20,876.06-31,312.71-9,785.23

Finding the Fourth Proportional to 20,876.06, 31,312.71 and 9,785.23

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Solution

The fourth proportional to 20,876.06, 31,312.71 and 9,785.23 is: 14,677.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.06 : 31,312.71 = 9,785.23 : x
  2. Step 2: Convert to fraction form
    20,876.06/31,312.71 = 9,785.23/x
  3. Step 3: Cross multiply
    20,876.06x = 31,312.71 × 9,785.23
  4. Step 4: Simplify right side
    20,876.06x = 306,401,990.99
  5. Step 5: Solve for x
    x = 306,401,990.99/20,876.06
  6. Step 6: Final answer
    x = 14,677.19

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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.