Home / 2,159.60-2,972.90-1,938.47

Finding the Fourth Proportional to 2,159.60, 2,972.90 and 1,938.47

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Solution

The fourth proportional to 2,159.60, 2,972.90 and 1,938.47 is: 2,668.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.60 : 2,972.90 = 1,938.47 : x
  2. Step 2: Convert to fraction form
    2,159.60/2,972.90 = 1,938.47/x
  3. Step 3: Cross multiply
    2,159.60x = 2,972.90 × 1,938.47
  4. Step 4: Simplify right side
    2,159.60x = 5,762,867.44
  5. Step 5: Solve for x
    x = 5,762,867.44/2,159.60
  6. Step 6: Final answer
    x = 2,668.49

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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.