Home / 20,864.88-28,790.28-13,317.45

Finding the Fourth Proportional to 20,864.88, 28,790.28 and 13,317.45

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Solution

The fourth proportional to 20,864.88, 28,790.28 and 13,317.45 is: 18,376.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.88 : 28,790.28 = 13,317.45 : x
  2. Step 2: Convert to fraction form
    20,864.88/28,790.28 = 13,317.45/x
  3. Step 3: Cross multiply
    20,864.88x = 28,790.28 × 13,317.45
  4. Step 4: Simplify right side
    20,864.88x = 383,413,114.39
  5. Step 5: Solve for x
    x = 383,413,114.39/20,864.88
  6. Step 6: Final answer
    x = 18,376.00

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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.