Home / 20,876.09-31,312.71-9,785.25

Finding the Fourth Proportional to 20,876.09, 31,312.71 and 9,785.25

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Solution

The fourth proportional to 20,876.09, 31,312.71 and 9,785.25 is: 14,677.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.09 : 31,312.71 = 9,785.25 : x
  2. Step 2: Convert to fraction form
    20,876.09/31,312.71 = 9,785.25/x
  3. Step 3: Cross multiply
    20,876.09x = 31,312.71 × 9,785.25
  4. Step 4: Simplify right side
    20,876.09x = 306,402,695.53
  5. Step 5: Solve for x
    x = 306,402,695.53/20,876.09
  6. Step 6: Final answer
    x = 14,677.21

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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.