Home / 21,421.40-32,099.70-18,116.60

Finding the Fourth Proportional to 21,421.40, 32,099.70 and 18,116.60

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Solution

The fourth proportional to 21,421.40, 32,099.70 and 18,116.60 is: 27,147.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.40 : 32,099.70 = 18,116.60 : x
  2. Step 2: Convert to fraction form
    21,421.40/32,099.70 = 18,116.60/x
  3. Step 3: Cross multiply
    21,421.40x = 32,099.70 × 18,116.60
  4. Step 4: Simplify right side
    21,421.40x = 581,537,425.02
  5. Step 5: Solve for x
    x = 581,537,425.02/21,421.40
  6. Step 6: Final answer
    x = 27,147.50

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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.