Home / 21,457.20-32,147.40-18,999.60

Finding the Fourth Proportional to 21,457.20, 32,147.40 and 18,999.60

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Solution

The fourth proportional to 21,457.20, 32,147.40 and 18,999.60 is: 28,465.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,457.20 : 32,147.40 = 18,999.60 : x
  2. Step 2: Convert to fraction form
    21,457.20/32,147.40 = 18,999.60/x
  3. Step 3: Cross multiply
    21,457.20x = 32,147.40 × 18,999.60
  4. Step 4: Simplify right side
    21,457.20x = 610,787,741.04
  5. Step 5: Solve for x
    x = 610,787,741.04/21,457.20
  6. Step 6: Final answer
    x = 28,465.40

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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.