Home / 15,374.70-21,172.42-13,357.20

Finding the Fourth Proportional to 15,374.70, 21,172.42 and 13,357.20

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Solution

The fourth proportional to 15,374.70, 21,172.42 and 13,357.20 is: 18,394.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,374.70 : 21,172.42 = 13,357.20 : x
  2. Step 2: Convert to fraction form
    15,374.70/21,172.42 = 13,357.20/x
  3. Step 3: Cross multiply
    15,374.70x = 21,172.42 × 13,357.20
  4. Step 4: Simplify right side
    15,374.70x = 282,804,248.42
  5. Step 5: Solve for x
    x = 282,804,248.42/15,374.70
  6. Step 6: Final answer
    x = 18,394.13

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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.