Home / 28,572.18-39,428.74-15,824.86

Finding the Fourth Proportional to 28,572.18, 39,428.74 and 15,824.86

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Solution

The fourth proportional to 28,572.18, 39,428.74 and 15,824.86 is: 21,837.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,572.18 : 39,428.74 = 15,824.86 : x
  2. Step 2: Convert to fraction form
    28,572.18/39,428.74 = 15,824.86/x
  3. Step 3: Cross multiply
    28,572.18x = 39,428.74 × 15,824.86
  4. Step 4: Simplify right side
    28,572.18x = 623,954,290.48
  5. Step 5: Solve for x
    x = 623,954,290.48/28,572.18
  6. Step 6: Final answer
    x = 21,837.83

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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.