Home / 21,408.40-32,112.60-19,294.30

Finding the Fourth Proportional to 21,408.40, 32,112.60 and 19,294.30

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Solution

The fourth proportional to 21,408.40, 32,112.60 and 19,294.30 is: 28,941.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.40 : 32,112.60 = 19,294.30 : x
  2. Step 2: Convert to fraction form
    21,408.40/32,112.60 = 19,294.30/x
  3. Step 3: Cross multiply
    21,408.40x = 32,112.60 × 19,294.30
  4. Step 4: Simplify right side
    21,408.40x = 619,590,138.18
  5. Step 5: Solve for x
    x = 619,590,138.18/21,408.40
  6. Step 6: Final answer
    x = 28,941.45

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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.