Home / 27,806.80-38,373.60-15,870.64

Finding the Fourth Proportional to 27,806.80, 38,373.60 and 15,870.64

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Solution

The fourth proportional to 27,806.80, 38,373.60 and 15,870.64 is: 21,901.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,806.80 : 38,373.60 = 15,870.64 : x
  2. Step 2: Convert to fraction form
    27,806.80/38,373.60 = 15,870.64/x
  3. Step 3: Cross multiply
    27,806.80x = 38,373.60 × 15,870.64
  4. Step 4: Simplify right side
    27,806.80x = 609,013,591.10
  5. Step 5: Solve for x
    x = 609,013,591.10/27,806.80
  6. Step 6: Final answer
    x = 21,901.61

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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.