Home / 15,503.41-21,395.13-8,788.76

Finding the Fourth Proportional to 15,503.41, 21,395.13 and 8,788.76

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Solution

The fourth proportional to 15,503.41, 21,395.13 and 8,788.76 is: 12,128.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.41 : 21,395.13 = 8,788.76 : x
  2. Step 2: Convert to fraction form
    15,503.41/21,395.13 = 8,788.76/x
  3. Step 3: Cross multiply
    15,503.41x = 21,395.13 × 8,788.76
  4. Step 4: Simplify right side
    15,503.41x = 188,036,662.74
  5. Step 5: Solve for x
    x = 188,036,662.74/15,503.41
  6. Step 6: Final answer
    x = 12,128.73

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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.