Home / 15,340.95-21,172.25-8,535.65

Finding the Fourth Proportional to 15,340.95, 21,172.25 and 8,535.65

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Solution

The fourth proportional to 15,340.95, 21,172.25 and 8,535.65 is: 11,780.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,340.95 : 21,172.25 = 8,535.65 : x
  2. Step 2: Convert to fraction form
    15,340.95/21,172.25 = 8,535.65/x
  3. Step 3: Cross multiply
    15,340.95x = 21,172.25 × 8,535.65
  4. Step 4: Simplify right side
    15,340.95x = 180,718,831.19
  5. Step 5: Solve for x
    x = 180,718,831.19/15,340.95
  6. Step 6: Final answer
    x = 11,780.16

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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.