Home / 13,881.90-19,159.42-13,420.56

Finding the Fourth Proportional to 13,881.90, 19,159.42 and 13,420.56

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Solution

The fourth proportional to 13,881.90, 19,159.42 and 13,420.56 is: 18,522.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.90 : 19,159.42 = 13,420.56 : x
  2. Step 2: Convert to fraction form
    13,881.90/19,159.42 = 13,420.56/x
  3. Step 3: Cross multiply
    13,881.90x = 19,159.42 × 13,420.56
  4. Step 4: Simplify right side
    13,881.90x = 257,130,145.68
  5. Step 5: Solve for x
    x = 257,130,145.68/13,881.90
  6. Step 6: Final answer
    x = 18,522.69

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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.