Home / 3,127.79-4,315.59-1,948.02

Finding the Fourth Proportional to 3,127.79, 4,315.59 and 1,948.02

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Solution

The fourth proportional to 3,127.79, 4,315.59 and 1,948.02 is: 2,687.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.79 : 4,315.59 = 1,948.02 : x
  2. Step 2: Convert to fraction form
    3,127.79/4,315.59 = 1,948.02/x
  3. Step 3: Cross multiply
    3,127.79x = 4,315.59 × 1,948.02
  4. Step 4: Simplify right side
    3,127.79x = 8,406,855.63
  5. Step 5: Solve for x
    x = 8,406,855.63/3,127.79
  6. Step 6: Final answer
    x = 2,687.80

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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.