Home / 7,478.77-10,320.70-4,121.57

Finding the Fourth Proportional to 7,478.77, 10,320.70 and 4,121.57

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Solution

The fourth proportional to 7,478.77, 10,320.70 and 4,121.57 is: 5,687.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.77 : 10,320.70 = 4,121.57 : x
  2. Step 2: Convert to fraction form
    7,478.77/10,320.70 = 4,121.57/x
  3. Step 3: Cross multiply
    7,478.77x = 10,320.70 × 4,121.57
  4. Step 4: Simplify right side
    7,478.77x = 42,537,510.72
  5. Step 5: Solve for x
    x = 42,537,510.72/7,478.77
  6. Step 6: Final answer
    x = 5,687.77

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Half scale
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Double scale
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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.