Home / 7,831.17-11,746.73-1,987.77

Finding the Fourth Proportional to 7,831.17, 11,746.73 and 1,987.77

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Solution

The fourth proportional to 7,831.17, 11,746.73 and 1,987.77 is: 2,981.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,831.17 : 11,746.73 = 1,987.77 : x
  2. Step 2: Convert to fraction form
    7,831.17/11,746.73 = 1,987.77/x
  3. Step 3: Cross multiply
    7,831.17x = 11,746.73 × 1,987.77
  4. Step 4: Simplify right side
    7,831.17x = 23,349,787.55
  5. Step 5: Solve for x
    x = 23,349,787.55/7,831.17
  6. Step 6: Final answer
    x = 2,981.65

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.