Home / 15,585.85-21,508.61-8,871.91

Finding the Fourth Proportional to 15,585.85, 21,508.61 and 8,871.91

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Solution

The fourth proportional to 15,585.85, 21,508.61 and 8,871.91 is: 12,243.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,585.85 : 21,508.61 = 8,871.91 : x
  2. Step 2: Convert to fraction form
    15,585.85/21,508.61 = 8,871.91/x
  3. Step 3: Cross multiply
    15,585.85x = 21,508.61 × 8,871.91
  4. Step 4: Simplify right side
    15,585.85x = 190,822,501.21
  5. Step 5: Solve for x
    x = 190,822,501.21/15,585.85
  6. Step 6: Final answer
    x = 12,243.32

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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.