Home / 20,407.10-28,159.64-11,455.59

Finding the Fourth Proportional to 20,407.10, 28,159.64 and 11,455.59

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Solution

The fourth proportional to 20,407.10, 28,159.64 and 11,455.59 is: 15,807.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.10 : 28,159.64 = 11,455.59 : x
  2. Step 2: Convert to fraction form
    20,407.10/28,159.64 = 11,455.59/x
  3. Step 3: Cross multiply
    20,407.10x = 28,159.64 × 11,455.59
  4. Step 4: Simplify right side
    20,407.10x = 322,585,290.39
  5. Step 5: Solve for x
    x = 322,585,290.39/20,407.10
  6. Step 6: Final answer
    x = 15,807.50

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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.