Home / 15,375.54-21,219.84-9,411.18

Finding the Fourth Proportional to 15,375.54, 21,219.84 and 9,411.18

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Solution

The fourth proportional to 15,375.54, 21,219.84 and 9,411.18 is: 12,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,375.54 : 21,219.84 = 9,411.18 : x
  2. Step 2: Convert to fraction form
    15,375.54/21,219.84 = 9,411.18/x
  3. Step 3: Cross multiply
    15,375.54x = 21,219.84 × 9,411.18
  4. Step 4: Simplify right side
    15,375.54x = 199,703,733.81
  5. Step 5: Solve for x
    x = 199,703,733.81/15,375.54
  6. Step 6: Final answer
    x = 12,988.40

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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.