Home / 25,990.79-35,867.65-15,915.55

Finding the Fourth Proportional to 25,990.79, 35,867.65 and 15,915.55

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Solution

The fourth proportional to 25,990.79, 35,867.65 and 15,915.55 is: 21,963.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,990.79 : 35,867.65 = 15,915.55 : x
  2. Step 2: Convert to fraction form
    25,990.79/35,867.65 = 15,915.55/x
  3. Step 3: Cross multiply
    25,990.79x = 35,867.65 × 15,915.55
  4. Step 4: Simplify right side
    25,990.79x = 570,853,473.37
  5. Step 5: Solve for x
    x = 570,853,473.37/25,990.79
  6. Step 6: Final answer
    x = 21,963.69

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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.