Home / 7,140.90-10,715.16-2,983.74

Finding the Fourth Proportional to 7,140.90, 10,715.16 and 2,983.74

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Solution

The fourth proportional to 7,140.90, 10,715.16 and 2,983.74 is: 4,477.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.90 : 10,715.16 = 2,983.74 : x
  2. Step 2: Convert to fraction form
    7,140.90/10,715.16 = 2,983.74/x
  3. Step 3: Cross multiply
    7,140.90x = 10,715.16 × 2,983.74
  4. Step 4: Simplify right side
    7,140.90x = 31,971,251.50
  5. Step 5: Solve for x
    x = 31,971,251.50/7,140.90
  6. Step 6: Final answer
    x = 4,477.20

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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.