Home / 15,535.25-21,420.10-12,692.15

Finding the Fourth Proportional to 15,535.25, 21,420.10 and 12,692.15

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Solution

The fourth proportional to 15,535.25, 21,420.10 and 12,692.15 is: 17,500.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,535.25 : 21,420.10 = 12,692.15 : x
  2. Step 2: Convert to fraction form
    15,535.25/21,420.10 = 12,692.15/x
  3. Step 3: Cross multiply
    15,535.25x = 21,420.10 × 12,692.15
  4. Step 4: Simplify right side
    15,535.25x = 271,867,122.22
  5. Step 5: Solve for x
    x = 271,867,122.22/15,535.25
  6. Step 6: Final answer
    x = 17,500.02

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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.