Home / 5,637.76-7,780.10-3,119.72

Finding the Fourth Proportional to 5,637.76, 7,780.10 and 3,119.72

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Solution

The fourth proportional to 5,637.76, 7,780.10 and 3,119.72 is: 4,305.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,637.76 : 7,780.10 = 3,119.72 : x
  2. Step 2: Convert to fraction form
    5,637.76/7,780.10 = 3,119.72/x
  3. Step 3: Cross multiply
    5,637.76x = 7,780.10 × 3,119.72
  4. Step 4: Simplify right side
    5,637.76x = 24,271,733.57
  5. Step 5: Solve for x
    x = 24,271,733.57/5,637.76
  6. Step 6: Final answer
    x = 4,305.21

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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.