Home / 39,615.18-54,669.36-21,709.79

Finding the Fourth Proportional to 39,615.18, 54,669.36 and 21,709.79

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Solution

The fourth proportional to 39,615.18, 54,669.36 and 21,709.79 is: 29,959.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,615.18 : 54,669.36 = 21,709.79 : x
  2. Step 2: Convert to fraction form
    39,615.18/54,669.36 = 21,709.79/x
  3. Step 3: Cross multiply
    39,615.18x = 54,669.36 × 21,709.79
  4. Step 4: Simplify right side
    39,615.18x = 1,186,860,338.11
  5. Step 5: Solve for x
    x = 1,186,860,338.11/39,615.18
  6. Step 6: Final answer
    x = 29,959.74

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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.