Home / 15,435.87-21,301.91-8,721.35

Finding the Fourth Proportional to 15,435.87, 21,301.91 and 8,721.35

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Solution

The fourth proportional to 15,435.87, 21,301.91 and 8,721.35 is: 12,035.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,435.87 : 21,301.91 = 8,721.35 : x
  2. Step 2: Convert to fraction form
    15,435.87/21,301.91 = 8,721.35/x
  3. Step 3: Cross multiply
    15,435.87x = 21,301.91 × 8,721.35
  4. Step 4: Simplify right side
    15,435.87x = 185,781,339.87
  5. Step 5: Solve for x
    x = 185,781,339.87/15,435.87
  6. Step 6: Final answer
    x = 12,035.69

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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.