Home / 15,820.12-21,831.89-8,650.18

Finding the Fourth Proportional to 15,820.12, 21,831.89 and 8,650.18

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Solution

The fourth proportional to 15,820.12, 21,831.89 and 8,650.18 is: 11,937.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,820.12 : 21,831.89 = 8,650.18 : x
  2. Step 2: Convert to fraction form
    15,820.12/21,831.89 = 8,650.18/x
  3. Step 3: Cross multiply
    15,820.12x = 21,831.89 × 8,650.18
  4. Step 4: Simplify right side
    15,820.12x = 188,849,745.29
  5. Step 5: Solve for x
    x = 188,849,745.29/15,820.12
  6. Step 6: Final answer
    x = 11,937.32

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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.