Home / 21,057.32-29,063.99-13,888.53

Finding the Fourth Proportional to 21,057.32, 29,063.99 and 13,888.53

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Solution

The fourth proportional to 21,057.32, 29,063.99 and 13,888.53 is: 19,169.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.32 : 29,063.99 = 13,888.53 : x
  2. Step 2: Convert to fraction form
    21,057.32/29,063.99 = 13,888.53/x
  3. Step 3: Cross multiply
    21,057.32x = 29,063.99 × 13,888.53
  4. Step 4: Simplify right side
    21,057.32x = 403,656,027.59
  5. Step 5: Solve for x
    x = 403,656,027.59/21,057.32
  6. Step 6: Final answer
    x = 19,169.40

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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.