Home / 20,707.90-28,577.02-11,276.54

Finding the Fourth Proportional to 20,707.90, 28,577.02 and 11,276.54

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Solution

The fourth proportional to 20,707.90, 28,577.02 and 11,276.54 is: 15,561.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.90 : 28,577.02 = 11,276.54 : x
  2. Step 2: Convert to fraction form
    20,707.90/28,577.02 = 11,276.54/x
  3. Step 3: Cross multiply
    20,707.90x = 28,577.02 × 11,276.54
  4. Step 4: Simplify right side
    20,707.90x = 322,249,909.11
  5. Step 5: Solve for x
    x = 322,249,909.11/20,707.90
  6. Step 6: Final answer
    x = 15,561.69

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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.