Home / 15,421.69-21,281.97-8,348.10

Finding the Fourth Proportional to 15,421.69, 21,281.97 and 8,348.10

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Solution

The fourth proportional to 15,421.69, 21,281.97 and 8,348.10 is: 11,520.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.69 : 21,281.97 = 8,348.10 : x
  2. Step 2: Convert to fraction form
    15,421.69/21,281.97 = 8,348.10/x
  3. Step 3: Cross multiply
    15,421.69x = 21,281.97 × 8,348.10
  4. Step 4: Simplify right side
    15,421.69x = 177,664,013.76
  5. Step 5: Solve for x
    x = 177,664,013.76/15,421.69
  6. Step 6: Final answer
    x = 11,520.40

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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.