Home / 7,848.40-10,831.36-5,191.20

Finding the Fourth Proportional to 7,848.40, 10,831.36 and 5,191.20

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Solution

The fourth proportional to 7,848.40, 10,831.36 and 5,191.20 is: 7,164.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,848.40 : 10,831.36 = 5,191.20 : x
  2. Step 2: Convert to fraction form
    7,848.40/10,831.36 = 5,191.20/x
  3. Step 3: Cross multiply
    7,848.40x = 10,831.36 × 5,191.20
  4. Step 4: Simplify right side
    7,848.40x = 56,227,756.03
  5. Step 5: Solve for x
    x = 56,227,756.03/7,848.40
  6. Step 6: Final answer
    x = 7,164.23

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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.