Home / 20,374.56-28,118.07-15,329.79

Finding the Fourth Proportional to 20,374.56, 28,118.07 and 15,329.79

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Solution

The fourth proportional to 20,374.56, 28,118.07 and 15,329.79 is: 21,156.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,374.56 : 28,118.07 = 15,329.79 : x
  2. Step 2: Convert to fraction form
    20,374.56/28,118.07 = 15,329.79/x
  3. Step 3: Cross multiply
    20,374.56x = 28,118.07 × 15,329.79
  4. Step 4: Simplify right side
    20,374.56x = 431,044,108.31
  5. Step 5: Solve for x
    x = 431,044,108.31/20,374.56
  6. Step 6: Final answer
    x = 21,156.00

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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.