Home / 20,370.80-28,113-13,316.24

Finding the Fourth Proportional to 20,370.80, 28,113 and 13,316.24

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Solution

The fourth proportional to 20,370.80, 28,113 and 13,316.24 is: 18,377.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.80 : 28,113 = 13,316.24 : x
  2. Step 2: Convert to fraction form
    20,370.80/28,113 = 13,316.24/x
  3. Step 3: Cross multiply
    20,370.80x = 28,113 × 13,316.24
  4. Step 4: Simplify right side
    20,370.80x = 374,359,455.12
  5. Step 5: Solve for x
    x = 374,359,455.12/20,370.80
  6. Step 6: Final answer
    x = 18,377.26

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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.