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Finding the Fourth Proportional to 44,430.80, 66,646.20 and 12,840.80

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Solution

The fourth proportional to 44,430.80, 66,646.20 and 12,840.80 is: 19,261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    44,430.80 : 66,646.20 = 12,840.80 : x
  2. Step 2: Convert to fraction form
    44,430.80/66,646.20 = 12,840.80/x
  3. Step 3: Cross multiply
    44,430.80x = 66,646.20 × 12,840.80
  4. Step 4: Simplify right side
    44,430.80x = 855,790,524.96
  5. Step 5: Solve for x
    x = 855,790,524.96/44,430.80
  6. Step 6: Final answer
    x = 19,261.20

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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.