Home / 1,981.48-2,728.93-1,531.69

Finding the Fourth Proportional to 1,981.48, 2,728.93 and 1,531.69

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Solution

The fourth proportional to 1,981.48, 2,728.93 and 1,531.69 is: 2,109.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.48 : 2,728.93 = 1,531.69 : x
  2. Step 2: Convert to fraction form
    1,981.48/2,728.93 = 1,531.69/x
  3. Step 3: Cross multiply
    1,981.48x = 2,728.93 × 1,531.69
  4. Step 4: Simplify right side
    1,981.48x = 4,179,867.13
  5. Step 5: Solve for x
    x = 4,179,867.13/1,981.48
  6. Step 6: Final answer
    x = 2,109.47

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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.