Home / 84,587.48-126,880.84-21,408.20

Finding the Fourth Proportional to 84,587.48, 126,880.84 and 21,408.20

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Solution

The fourth proportional to 84,587.48, 126,880.84 and 21,408.20 is: 32,112.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,587.48 : 126,880.84 = 21,408.20 : x
  2. Step 2: Convert to fraction form
    84,587.48/126,880.84 = 21,408.20/x
  3. Step 3: Cross multiply
    84,587.48x = 126,880.84 × 21,408.20
  4. Step 4: Simplify right side
    84,587.48x = 2,716,290,398.89
  5. Step 5: Solve for x
    x = 2,716,290,398.89/84,587.48
  6. Step 6: Final answer
    x = 32,112.20

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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.