Home / 20,870.03-28,800.47-11,438.57

Finding the Fourth Proportional to 20,870.03, 28,800.47 and 11,438.57

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Solution

The fourth proportional to 20,870.03, 28,800.47 and 11,438.57 is: 15,785.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.03 : 28,800.47 = 11,438.57 : x
  2. Step 2: Convert to fraction form
    20,870.03/28,800.47 = 11,438.57/x
  3. Step 3: Cross multiply
    20,870.03x = 28,800.47 × 11,438.57
  4. Step 4: Simplify right side
    20,870.03x = 329,435,990.93
  5. Step 5: Solve for x
    x = 329,435,990.93/20,870.03
  6. Step 6: Final answer
    x = 15,785.13

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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.