Home / 28,429.86-42,627.78-13,440.84

Finding the Fourth Proportional to 28,429.86, 42,627.78 and 13,440.84

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Solution

The fourth proportional to 28,429.86, 42,627.78 and 13,440.84 is: 20,153.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,429.86 : 42,627.78 = 13,440.84 : x
  2. Step 2: Convert to fraction form
    28,429.86/42,627.78 = 13,440.84/x
  3. Step 3: Cross multiply
    28,429.86x = 42,627.78 × 13,440.84
  4. Step 4: Simplify right side
    28,429.86x = 572,953,170.54
  5. Step 5: Solve for x
    x = 572,953,170.54/28,429.86
  6. Step 6: Final answer
    x = 20,153.22

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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.