Home / 28,448.17-42,640.45-10,661.72

Finding the Fourth Proportional to 28,448.17, 42,640.45 and 10,661.72

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Solution

The fourth proportional to 28,448.17, 42,640.45 and 10,661.72 is: 15,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,448.17 : 42,640.45 = 10,661.72 : x
  2. Step 2: Convert to fraction form
    28,448.17/42,640.45 = 10,661.72/x
  3. Step 3: Cross multiply
    28,448.17x = 42,640.45 × 10,661.72
  4. Step 4: Simplify right side
    28,448.17x = 454,620,298.72
  5. Step 5: Solve for x
    x = 454,620,298.72/28,448.17
  6. Step 6: Final answer
    x = 15,980.65

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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.