Home / 15,423.40-21,284.16-8,349.76

Finding the Fourth Proportional to 15,423.40, 21,284.16 and 8,349.76

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Solution

The fourth proportional to 15,423.40, 21,284.16 and 8,349.76 is: 11,522.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,423.40 : 21,284.16 = 8,349.76 : x
  2. Step 2: Convert to fraction form
    15,423.40/21,284.16 = 8,349.76/x
  3. Step 3: Cross multiply
    15,423.40x = 21,284.16 × 8,349.76
  4. Step 4: Simplify right side
    15,423.40x = 177,717,627.80
  5. Step 5: Solve for x
    x = 177,717,627.80/15,423.40
  6. Step 6: Final answer
    x = 11,522.60

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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.