Home / 7,478.90-10,320.56-4,289.98

Finding the Fourth Proportional to 7,478.90, 10,320.56 and 4,289.98

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Solution

The fourth proportional to 7,478.90, 10,320.56 and 4,289.98 is: 5,919.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.90 : 10,320.56 = 4,289.98 : x
  2. Step 2: Convert to fraction form
    7,478.90/10,320.56 = 4,289.98/x
  3. Step 3: Cross multiply
    7,478.90x = 10,320.56 × 4,289.98
  4. Step 4: Simplify right side
    7,478.90x = 44,274,995.99
  5. Step 5: Solve for x
    x = 44,274,995.99/7,478.90
  6. Step 6: Final answer
    x = 5,919.99

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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.