Home / 2,987.49-4,123.13-1,809.30

Finding the Fourth Proportional to 2,987.49, 4,123.13 and 1,809.30

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Solution

The fourth proportional to 2,987.49, 4,123.13 and 1,809.30 is: 2,497.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.49 : 4,123.13 = 1,809.30 : x
  2. Step 2: Convert to fraction form
    2,987.49/4,123.13 = 1,809.30/x
  3. Step 3: Cross multiply
    2,987.49x = 4,123.13 × 1,809.30
  4. Step 4: Simplify right side
    2,987.49x = 7,459,979.11
  5. Step 5: Solve for x
    x = 7,459,979.11/2,987.49
  6. Step 6: Final answer
    x = 2,497.07

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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.