Home / 21,135.55-29,165.89-11,703.50

Finding the Fourth Proportional to 21,135.55, 29,165.89 and 11,703.50

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Solution

The fourth proportional to 21,135.55, 29,165.89 and 11,703.50 is: 16,150.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.55 : 29,165.89 = 11,703.50 : x
  2. Step 2: Convert to fraction form
    21,135.55/29,165.89 = 11,703.50/x
  3. Step 3: Cross multiply
    21,135.55x = 29,165.89 × 11,703.50
  4. Step 4: Simplify right side
    21,135.55x = 341,342,935.10
  5. Step 5: Solve for x
    x = 341,342,935.10/21,135.55
  6. Step 6: Final answer
    x = 16,150.18

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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.