Home / 15,503.11-21,386.78-9,211.03

Finding the Fourth Proportional to 15,503.11, 21,386.78 and 9,211.03

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Solution

The fourth proportional to 15,503.11, 21,386.78 and 9,211.03 is: 12,706.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.11 : 21,386.78 = 9,211.03 : x
  2. Step 2: Convert to fraction form
    15,503.11/21,386.78 = 9,211.03/x
  3. Step 3: Cross multiply
    15,503.11x = 21,386.78 × 9,211.03
  4. Step 4: Simplify right side
    15,503.11x = 196,994,226.13
  5. Step 5: Solve for x
    x = 196,994,226.13/15,503.11
  6. Step 6: Final answer
    x = 12,706.76

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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.