Home / 40,638.48-60,959.76-12,938.64

Finding the Fourth Proportional to 40,638.48, 60,959.76 and 12,938.64

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Solution

The fourth proportional to 40,638.48, 60,959.76 and 12,938.64 is: 19,408.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,638.48 : 60,959.76 = 12,938.64 : x
  2. Step 2: Convert to fraction form
    40,638.48/60,959.76 = 12,938.64/x
  3. Step 3: Cross multiply
    40,638.48x = 60,959.76 × 12,938.64
  4. Step 4: Simplify right side
    40,638.48x = 788,736,389.13
  5. Step 5: Solve for x
    x = 788,736,389.13/40,638.48
  6. Step 6: Final answer
    x = 19,408.61

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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.