Home / 12,420.81-18,632.43-4,627.80

Finding the Fourth Proportional to 12,420.81, 18,632.43 and 4,627.80

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Solution

The fourth proportional to 12,420.81, 18,632.43 and 4,627.80 is: 6,942.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.81 : 18,632.43 = 4,627.80 : x
  2. Step 2: Convert to fraction form
    12,420.81/18,632.43 = 4,627.80/x
  3. Step 3: Cross multiply
    12,420.81x = 18,632.43 × 4,627.80
  4. Step 4: Simplify right side
    12,420.81x = 86,227,159.55
  5. Step 5: Solve for x
    x = 86,227,159.55/12,420.81
  6. Step 6: Final answer
    x = 6,942.15

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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.