Home / 15,555.93-21,459.38-9,881.43

Finding the Fourth Proportional to 15,555.93, 21,459.38 and 9,881.43

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Solution

The fourth proportional to 15,555.93, 21,459.38 and 9,881.43 is: 13,631.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,555.93 : 21,459.38 = 9,881.43 : x
  2. Step 2: Convert to fraction form
    15,555.93/21,459.38 = 9,881.43/x
  3. Step 3: Cross multiply
    15,555.93x = 21,459.38 × 9,881.43
  4. Step 4: Simplify right side
    15,555.93x = 212,049,361.31
  5. Step 5: Solve for x
    x = 212,049,361.31/15,555.93
  6. Step 6: Final answer
    x = 13,631.42

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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.