Home / 3,156.40-4,357.02-1,977.76

Finding the Fourth Proportional to 3,156.40, 4,357.02 and 1,977.76

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Solution

The fourth proportional to 3,156.40, 4,357.02 and 1,977.76 is: 2,730.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.40 : 4,357.02 = 1,977.76 : x
  2. Step 2: Convert to fraction form
    3,156.40/4,357.02 = 1,977.76/x
  3. Step 3: Cross multiply
    3,156.40x = 4,357.02 × 1,977.76
  4. Step 4: Simplify right side
    3,156.40x = 8,617,139.88
  5. Step 5: Solve for x
    x = 8,617,139.88/3,156.40
  6. Step 6: Final answer
    x = 2,730.05

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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.