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Finding the Fourth Proportional to 13,423.95, 20,143.16 and 7,888.10

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Solution

The fourth proportional to 13,423.95, 20,143.16 and 7,888.10 is: 11,836.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.95 : 20,143.16 = 7,888.10 : x
  2. Step 2: Convert to fraction form
    13,423.95/20,143.16 = 7,888.10/x
  3. Step 3: Cross multiply
    13,423.95x = 20,143.16 × 7,888.10
  4. Step 4: Simplify right side
    13,423.95x = 158,891,260.40
  5. Step 5: Solve for x
    x = 158,891,260.40/13,423.95
  6. Step 6: Final answer
    x = 11,836.40

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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.