Home / 20,397.85-28,148.86-11,445.36

Finding the Fourth Proportional to 20,397.85, 28,148.86 and 11,445.36

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Solution

The fourth proportional to 20,397.85, 28,148.86 and 11,445.36 is: 15,794.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,397.85 : 28,148.86 = 11,445.36 : x
  2. Step 2: Convert to fraction form
    20,397.85/28,148.86 = 11,445.36/x
  3. Step 3: Cross multiply
    20,397.85x = 28,148.86 × 11,445.36
  4. Step 4: Simplify right side
    20,397.85x = 322,173,836.29
  5. Step 5: Solve for x
    x = 322,173,836.29/20,397.85
  6. Step 6: Final answer
    x = 15,794.50

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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.