Home / 20,859.06-31,283.10-7,715.18

Finding the Fourth Proportional to 20,859.06, 31,283.10 and 7,715.18

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Solution

The fourth proportional to 20,859.06, 31,283.10 and 7,715.18 is: 11,570.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.06 : 31,283.10 = 7,715.18 : x
  2. Step 2: Convert to fraction form
    20,859.06/31,283.10 = 7,715.18/x
  3. Step 3: Cross multiply
    20,859.06x = 31,283.10 × 7,715.18
  4. Step 4: Simplify right side
    20,859.06x = 241,354,747.46
  5. Step 5: Solve for x
    x = 241,354,747.46/20,859.06
  6. Step 6: Final answer
    x = 11,570.74

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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.