Home / 28,420.40-39,191.10-18,856.94

Finding the Fourth Proportional to 28,420.40, 39,191.10 and 18,856.94

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Solution

The fourth proportional to 28,420.40, 39,191.10 and 18,856.94 is: 26,003.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.40 : 39,191.10 = 18,856.94 : x
  2. Step 2: Convert to fraction form
    28,420.40/39,191.10 = 18,856.94/x
  3. Step 3: Cross multiply
    28,420.40x = 39,191.10 × 18,856.94
  4. Step 4: Simplify right side
    28,420.40x = 739,024,025.28
  5. Step 5: Solve for x
    x = 739,024,025.28/28,420.40
  6. Step 6: Final answer
    x = 26,003.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.