Home / 28,316.80-39,077.22-15,570.20

Finding the Fourth Proportional to 28,316.80, 39,077.22 and 15,570.20

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Solution

The fourth proportional to 28,316.80, 39,077.22 and 15,570.20 is: 21,486.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,316.80 : 39,077.22 = 15,570.20 : x
  2. Step 2: Convert to fraction form
    28,316.80/39,077.22 = 15,570.20/x
  3. Step 3: Cross multiply
    28,316.80x = 39,077.22 × 15,570.20
  4. Step 4: Simplify right side
    28,316.80x = 608,440,286.93
  5. Step 5: Solve for x
    x = 608,440,286.93/28,316.80
  6. Step 6: Final answer
    x = 21,486.90

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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.