Home / 21,087.11-29,088.69-13,525.03

Finding the Fourth Proportional to 21,087.11, 29,088.69 and 13,525.03

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Solution

The fourth proportional to 21,087.11, 29,088.69 and 13,525.03 is: 18,657.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.11 : 29,088.69 = 13,525.03 : x
  2. Step 2: Convert to fraction form
    21,087.11/29,088.69 = 13,525.03/x
  3. Step 3: Cross multiply
    21,087.11x = 29,088.69 × 13,525.03
  4. Step 4: Simplify right side
    21,087.11x = 393,425,341.05
  5. Step 5: Solve for x
    x = 393,425,341.05/21,087.11
  6. Step 6: Final answer
    x = 18,657.15

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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.