Home / 15,077.50-20,809.38-8,788.66

Finding the Fourth Proportional to 15,077.50, 20,809.38 and 8,788.66

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Solution

The fourth proportional to 15,077.50, 20,809.38 and 8,788.66 is: 12,129.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,077.50 : 20,809.38 = 8,788.66 : x
  2. Step 2: Convert to fraction form
    15,077.50/20,809.38 = 8,788.66/x
  3. Step 3: Cross multiply
    15,077.50x = 20,809.38 × 8,788.66
  4. Step 4: Simplify right side
    15,077.50x = 182,886,565.63
  5. Step 5: Solve for x
    x = 182,886,565.63/15,077.50
  6. Step 6: Final answer
    x = 12,129.77

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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.