Home / 28,143.84-42,220.32-10,615.20

Finding the Fourth Proportional to 28,143.84, 42,220.32 and 10,615.20

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Solution

The fourth proportional to 28,143.84, 42,220.32 and 10,615.20 is: 15,924.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.84 : 42,220.32 = 10,615.20 : x
  2. Step 2: Convert to fraction form
    28,143.84/42,220.32 = 10,615.20/x
  3. Step 3: Cross multiply
    28,143.84x = 42,220.32 × 10,615.20
  4. Step 4: Simplify right side
    28,143.84x = 448,177,140.86
  5. Step 5: Solve for x
    x = 448,177,140.86/28,143.84
  6. Step 6: Final answer
    x = 15,924.52

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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.