Home / 21,332.80-32,013.60-13,919.20

Finding the Fourth Proportional to 21,332.80, 32,013.60 and 13,919.20

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Solution

The fourth proportional to 21,332.80, 32,013.60 and 13,919.20 is: 20,888.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,332.80 : 32,013.60 = 13,919.20 : x
  2. Step 2: Convert to fraction form
    21,332.80/32,013.60 = 13,919.20/x
  3. Step 3: Cross multiply
    21,332.80x = 32,013.60 × 13,919.20
  4. Step 4: Simplify right side
    21,332.80x = 445,603,701.12
  5. Step 5: Solve for x
    x = 445,603,701.12/21,332.80
  6. Step 6: Final answer
    x = 20,888.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.