Home / 20,369.40-28,099.72-13,656.48

Finding the Fourth Proportional to 20,369.40, 28,099.72 and 13,656.48

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Solution

The fourth proportional to 20,369.40, 28,099.72 and 13,656.48 is: 18,839.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,369.40 : 28,099.72 = 13,656.48 : x
  2. Step 2: Convert to fraction form
    20,369.40/28,099.72 = 13,656.48/x
  3. Step 3: Cross multiply
    20,369.40x = 28,099.72 × 13,656.48
  4. Step 4: Simplify right side
    20,369.40x = 383,743,264.19
  5. Step 5: Solve for x
    x = 383,743,264.19/20,369.40
  6. Step 6: Final answer
    x = 18,839.20

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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.