Home / 28,985.85-43,478.78-15,831.04

Finding the Fourth Proportional to 28,985.85, 43,478.78 and 15,831.04

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Solution

The fourth proportional to 28,985.85, 43,478.78 and 15,831.04 is: 23,746.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,985.85 : 43,478.78 = 15,831.04 : x
  2. Step 2: Convert to fraction form
    28,985.85/43,478.78 = 15,831.04/x
  3. Step 3: Cross multiply
    28,985.85x = 43,478.78 × 15,831.04
  4. Step 4: Simplify right side
    28,985.85x = 688,314,305.33
  5. Step 5: Solve for x
    x = 688,314,305.33/28,985.85
  6. Step 6: Final answer
    x = 23,746.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.