Home / 20,615.02-28,440.60-12,643.40

Finding the Fourth Proportional to 20,615.02, 28,440.60 and 12,643.40

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Solution

The fourth proportional to 20,615.02, 28,440.60 and 12,643.40 is: 17,442.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.02 : 28,440.60 = 12,643.40 : x
  2. Step 2: Convert to fraction form
    20,615.02/28,440.60 = 12,643.40/x
  3. Step 3: Cross multiply
    20,615.02x = 28,440.60 × 12,643.40
  4. Step 4: Simplify right side
    20,615.02x = 359,585,882.04
  5. Step 5: Solve for x
    x = 359,585,882.04/20,615.02
  6. Step 6: Final answer
    x = 17,442.91

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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.