Home / 20,591.13-28,418.80-13,038.16

Finding the Fourth Proportional to 20,591.13, 28,418.80 and 13,038.16

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Solution

The fourth proportional to 20,591.13, 28,418.80 and 13,038.16 is: 17,994.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,591.13 : 28,418.80 = 13,038.16 : x
  2. Step 2: Convert to fraction form
    20,591.13/28,418.80 = 13,038.16/x
  3. Step 3: Cross multiply
    20,591.13x = 28,418.80 × 13,038.16
  4. Step 4: Simplify right side
    20,591.13x = 370,528,822.96
  5. Step 5: Solve for x
    x = 370,528,822.96/20,591.13
  6. Step 6: Final answer
    x = 17,994.59

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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.