Home / 28,818.75-39,769.88-15,570.75

Finding the Fourth Proportional to 28,818.75, 39,769.88 and 15,570.75

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Solution

The fourth proportional to 28,818.75, 39,769.88 and 15,570.75 is: 21,487.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,818.75 : 39,769.88 = 15,570.75 : x
  2. Step 2: Convert to fraction form
    28,818.75/39,769.88 = 15,570.75/x
  3. Step 3: Cross multiply
    28,818.75x = 39,769.88 × 15,570.75
  4. Step 4: Simplify right side
    28,818.75x = 619,246,781.16
  5. Step 5: Solve for x
    x = 619,246,781.16/28,818.75
  6. Step 6: Final answer
    x = 21,487.64

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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.