Home / 84,579.48-126,868.84-21,400.20

Finding the Fourth Proportional to 84,579.48, 126,868.84 and 21,400.20

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Solution

The fourth proportional to 84,579.48, 126,868.84 and 21,400.20 is: 32,100.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,579.48 : 126,868.84 = 21,400.20 : x
  2. Step 2: Convert to fraction form
    84,579.48/126,868.84 = 21,400.20/x
  3. Step 3: Cross multiply
    84,579.48x = 126,868.84 × 21,400.20
  4. Step 4: Simplify right side
    84,579.48x = 2,715,018,549.77
  5. Step 5: Solve for x
    x = 2,715,018,549.77/84,579.48
  6. Step 6: Final answer
    x = 32,100.20

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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.