Home / 28,818.14-39,769-15,570.14

Finding the Fourth Proportional to 28,818.14, 39,769 and 15,570.14

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Solution

The fourth proportional to 28,818.14, 39,769 and 15,570.14 is: 21,486.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,818.14 : 39,769 = 15,570.14 : x
  2. Step 2: Convert to fraction form
    28,818.14/39,769 = 15,570.14/x
  3. Step 3: Cross multiply
    28,818.14x = 39,769 × 15,570.14
  4. Step 4: Simplify right side
    28,818.14x = 619,208,897.66
  5. Step 5: Solve for x
    x = 619,208,897.66/28,818.14
  6. Step 6: Final answer
    x = 21,486.78

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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.