Home / 20,915.64-28,820.67-19,439.01

Finding the Fourth Proportional to 20,915.64, 28,820.67 and 19,439.01

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Solution

The fourth proportional to 20,915.64, 28,820.67 and 19,439.01 is: 26,785.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.64 : 28,820.67 = 19,439.01 : x
  2. Step 2: Convert to fraction form
    20,915.64/28,820.67 = 19,439.01/x
  3. Step 3: Cross multiply
    20,915.64x = 28,820.67 × 19,439.01
  4. Step 4: Simplify right side
    20,915.64x = 560,245,437.18
  5. Step 5: Solve for x
    x = 560,245,437.18/20,915.64
  6. Step 6: Final answer
    x = 26,785.95

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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.