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Finding the Fourth Proportional to 15,719.40, 23,627.70 and 15,427.80

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Solution

The fourth proportional to 15,719.40, 23,627.70 and 15,427.80 is: 23,189.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,719.40 : 23,627.70 = 15,427.80 : x
  2. Step 2: Convert to fraction form
    15,719.40/23,627.70 = 15,427.80/x
  3. Step 3: Cross multiply
    15,719.40x = 23,627.70 × 15,427.80
  4. Step 4: Simplify right side
    15,719.40x = 364,523,430.06
  5. Step 5: Solve for x
    x = 364,523,430.06/15,719.40
  6. Step 6: Final answer
    x = 23,189.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.