Home / 19,778.48-29,638.56-18,670.40

Finding the Fourth Proportional to 19,778.48, 29,638.56 and 18,670.40

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Solution

The fourth proportional to 19,778.48, 29,638.56 and 18,670.40 is: 27,978.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,778.48 : 29,638.56 = 18,670.40 : x
  2. Step 2: Convert to fraction form
    19,778.48/29,638.56 = 18,670.40/x
  3. Step 3: Cross multiply
    19,778.48x = 29,638.56 × 18,670.40
  4. Step 4: Simplify right side
    19,778.48x = 553,363,770.62
  5. Step 5: Solve for x
    x = 553,363,770.62/19,778.48
  6. Step 6: Final answer
    x = 27,978.07

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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.