Home / 7,420.78-10,247.63-4,772.80

Finding the Fourth Proportional to 7,420.78, 10,247.63 and 4,772.80

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Solution

The fourth proportional to 7,420.78, 10,247.63 and 4,772.80 is: 6,590.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.78 : 10,247.63 = 4,772.80 : x
  2. Step 2: Convert to fraction form
    7,420.78/10,247.63 = 4,772.80/x
  3. Step 3: Cross multiply
    7,420.78x = 10,247.63 × 4,772.80
  4. Step 4: Simplify right side
    7,420.78x = 48,909,888.46
  5. Step 5: Solve for x
    x = 48,909,888.46/7,420.78
  6. Step 6: Final answer
    x = 6,590.94

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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.