Home / 20,700.93-28,551.87-13,140.69

Finding the Fourth Proportional to 20,700.93, 28,551.87 and 13,140.69

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Solution

The fourth proportional to 20,700.93, 28,551.87 and 13,140.69 is: 18,124.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.93 : 28,551.87 = 13,140.69 : x
  2. Step 2: Convert to fraction form
    20,700.93/28,551.87 = 13,140.69/x
  3. Step 3: Cross multiply
    20,700.93x = 28,551.87 × 13,140.69
  4. Step 4: Simplify right side
    20,700.93x = 375,191,272.59
  5. Step 5: Solve for x
    x = 375,191,272.59/20,700.93
  6. Step 6: Final answer
    x = 18,124.37

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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.