Home / 7,112.80-9,812.64-4,458.40

Finding the Fourth Proportional to 7,112.80, 9,812.64 and 4,458.40

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Solution

The fourth proportional to 7,112.80, 9,812.64 and 4,458.40 is: 6,150.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.80 : 9,812.64 = 4,458.40 : x
  2. Step 2: Convert to fraction form
    7,112.80/9,812.64 = 4,458.40/x
  3. Step 3: Cross multiply
    7,112.80x = 9,812.64 × 4,458.40
  4. Step 4: Simplify right side
    7,112.80x = 43,748,674.18
  5. Step 5: Solve for x
    x = 43,748,674.18/7,112.80
  6. Step 6: Final answer
    x = 6,150.70

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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.