Home / 28,102.69-38,780.55-15,356.31

Finding the Fourth Proportional to 28,102.69, 38,780.55 and 15,356.31

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Solution

The fourth proportional to 28,102.69, 38,780.55 and 15,356.31 is: 21,191.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,102.69 : 38,780.55 = 15,356.31 : x
  2. Step 2: Convert to fraction form
    28,102.69/38,780.55 = 15,356.31/x
  3. Step 3: Cross multiply
    28,102.69x = 38,780.55 × 15,356.31
  4. Step 4: Simplify right side
    28,102.69x = 595,526,002.34
  5. Step 5: Solve for x
    x = 595,526,002.34/28,102.69
  6. Step 6: Final answer
    x = 21,191.07

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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.