Home / 15,386.32-21,249.84-13,398.58

Finding the Fourth Proportional to 15,386.32, 21,249.84 and 13,398.58

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Solution

The fourth proportional to 15,386.32, 21,249.84 and 13,398.58 is: 18,504.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,386.32 : 21,249.84 = 13,398.58 : x
  2. Step 2: Convert to fraction form
    15,386.32/21,249.84 = 13,398.58/x
  3. Step 3: Cross multiply
    15,386.32x = 21,249.84 × 13,398.58
  4. Step 4: Simplify right side
    15,386.32x = 284,717,681.23
  5. Step 5: Solve for x
    x = 284,717,681.23/15,386.32
  6. Step 6: Final answer
    x = 18,504.60

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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.