Home / 27,880.11-38,475.13-15,780.60

Finding the Fourth Proportional to 27,880.11, 38,475.13 and 15,780.60

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Solution

The fourth proportional to 27,880.11, 38,475.13 and 15,780.60 is: 21,777.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,880.11 : 38,475.13 = 15,780.60 : x
  2. Step 2: Convert to fraction form
    27,880.11/38,475.13 = 15,780.60/x
  3. Step 3: Cross multiply
    27,880.11x = 38,475.13 × 15,780.60
  4. Step 4: Simplify right side
    27,880.11x = 607,160,636.48
  5. Step 5: Solve for x
    x = 607,160,636.48/27,880.11
  6. Step 6: Final answer
    x = 21,777.56

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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.