Home / 20,561.67-28,374.93-11,130.15

Finding the Fourth Proportional to 20,561.67, 28,374.93 and 11,130.15

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Solution

The fourth proportional to 20,561.67, 28,374.93 and 11,130.15 is: 15,359.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.67 : 28,374.93 = 11,130.15 : x
  2. Step 2: Convert to fraction form
    20,561.67/28,374.93 = 11,130.15/x
  3. Step 3: Cross multiply
    20,561.67x = 28,374.93 × 11,130.15
  4. Step 4: Simplify right side
    20,561.67x = 315,817,227.14
  5. Step 5: Solve for x
    x = 315,817,227.14/20,561.67
  6. Step 6: Final answer
    x = 15,359.51

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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.