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Finding the Fourth Proportional to 43,684.40, 65,526.60 and 18,720.20

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Solution

The fourth proportional to 43,684.40, 65,526.60 and 18,720.20 is: 28,080.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,684.40 : 65,526.60 = 18,720.20 : x
  2. Step 2: Convert to fraction form
    43,684.40/65,526.60 = 18,720.20/x
  3. Step 3: Cross multiply
    43,684.40x = 65,526.60 × 18,720.20
  4. Step 4: Simplify right side
    43,684.40x = 1,226,671,057.32
  5. Step 5: Solve for x
    x = 1,226,671,057.32/43,684.40
  6. Step 6: Final answer
    x = 28,080.30

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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.