Home / 13,831.91-19,089.65-7,864.47

Finding the Fourth Proportional to 13,831.91, 19,089.65 and 7,864.47

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Solution

The fourth proportional to 13,831.91, 19,089.65 and 7,864.47 is: 10,853.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,831.91 : 19,089.65 = 7,864.47 : x
  2. Step 2: Convert to fraction form
    13,831.91/19,089.65 = 7,864.47/x
  3. Step 3: Cross multiply
    13,831.91x = 19,089.65 × 7,864.47
  4. Step 4: Simplify right side
    13,831.91x = 150,129,940.41
  5. Step 5: Solve for x
    x = 150,129,940.41/13,831.91
  6. Step 6: Final answer
    x = 10,853.89

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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.