Home / 10,831.68-14,939.51-7,857.36

Finding the Fourth Proportional to 10,831.68, 14,939.51 and 7,857.36

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Solution

The fourth proportional to 10,831.68, 14,939.51 and 7,857.36 is: 10,837.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,831.68 : 14,939.51 = 7,857.36 : x
  2. Step 2: Convert to fraction form
    10,831.68/14,939.51 = 7,857.36/x
  3. Step 3: Cross multiply
    10,831.68x = 14,939.51 × 7,857.36
  4. Step 4: Simplify right side
    10,831.68x = 117,385,069.01
  5. Step 5: Solve for x
    x = 117,385,069.01/10,831.68
  6. Step 6: Final answer
    x = 10,837.20

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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.