Home / 15,445.38-21,313.80-8,730.61

Finding the Fourth Proportional to 15,445.38, 21,313.80 and 8,730.61

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Solution

The fourth proportional to 15,445.38, 21,313.80 and 8,730.61 is: 12,047.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.38 : 21,313.80 = 8,730.61 : x
  2. Step 2: Convert to fraction form
    15,445.38/21,313.80 = 8,730.61/x
  3. Step 3: Cross multiply
    15,445.38x = 21,313.80 × 8,730.61
  4. Step 4: Simplify right side
    15,445.38x = 186,082,445.25
  5. Step 5: Solve for x
    x = 186,082,445.25/15,445.38
  6. Step 6: Final answer
    x = 12,047.77

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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.