Home / 7,278.40-10,917.60-4,362.40

Finding the Fourth Proportional to 7,278.40, 10,917.60 and 4,362.40

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Solution

The fourth proportional to 7,278.40, 10,917.60 and 4,362.40 is: 6,543.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,278.40 : 10,917.60 = 4,362.40 : x
  2. Step 2: Convert to fraction form
    7,278.40/10,917.60 = 4,362.40/x
  3. Step 3: Cross multiply
    7,278.40x = 10,917.60 × 4,362.40
  4. Step 4: Simplify right side
    7,278.40x = 47,626,938.24
  5. Step 5: Solve for x
    x = 47,626,938.24/7,278.40
  6. Step 6: Final answer
    x = 6,543.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.