Home / 15,820.45-21,831.12-8,746.31

Finding the Fourth Proportional to 15,820.45, 21,831.12 and 8,746.31

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Solution

The fourth proportional to 15,820.45, 21,831.12 and 8,746.31 is: 12,069.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,820.45 : 21,831.12 = 8,746.31 : x
  2. Step 2: Convert to fraction form
    15,820.45/21,831.12 = 8,746.31/x
  3. Step 3: Cross multiply
    15,820.45x = 21,831.12 × 8,746.31
  4. Step 4: Simplify right side
    15,820.45x = 190,941,797.75
  5. Step 5: Solve for x
    x = 190,941,797.75/15,820.45
  6. Step 6: Final answer
    x = 12,069.30

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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.