Home / 15,371.55-21,168.14-13,354.05

Finding the Fourth Proportional to 15,371.55, 21,168.14 and 13,354.05

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Solution

The fourth proportional to 15,371.55, 21,168.14 and 13,354.05 is: 18,389.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,371.55 : 21,168.14 = 13,354.05 : x
  2. Step 2: Convert to fraction form
    15,371.55/21,168.14 = 13,354.05/x
  3. Step 3: Cross multiply
    15,371.55x = 21,168.14 × 13,354.05
  4. Step 4: Simplify right side
    15,371.55x = 282,680,327.51
  5. Step 5: Solve for x
    x = 282,680,327.51/15,371.55
  6. Step 6: Final answer
    x = 18,389.84

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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.