Home / 7,124.36-9,831.70-3,980.18

Finding the Fourth Proportional to 7,124.36, 9,831.70 and 3,980.18

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Solution

The fourth proportional to 7,124.36, 9,831.70 and 3,980.18 is: 5,492.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,124.36 : 9,831.70 = 3,980.18 : x
  2. Step 2: Convert to fraction form
    7,124.36/9,831.70 = 3,980.18/x
  3. Step 3: Cross multiply
    7,124.36x = 9,831.70 × 3,980.18
  4. Step 4: Simplify right side
    7,124.36x = 39,131,935.71
  5. Step 5: Solve for x
    x = 39,131,935.71/7,124.36
  6. Step 6: Final answer
    x = 5,492.69

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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.