Home / 15,853.57-21,828.13-13,458.58

Finding the Fourth Proportional to 15,853.57, 21,828.13 and 13,458.58

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Solution

The fourth proportional to 15,853.57, 21,828.13 and 13,458.58 is: 18,530.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,853.57 : 21,828.13 = 13,458.58 : x
  2. Step 2: Convert to fraction form
    15,853.57/21,828.13 = 13,458.58/x
  3. Step 3: Cross multiply
    15,853.57x = 21,828.13 × 13,458.58
  4. Step 4: Simplify right side
    15,853.57x = 293,775,524.71
  5. Step 5: Solve for x
    x = 293,775,524.71/15,853.57
  6. Step 6: Final answer
    x = 18,530.57

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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.