Home / 15,218.07-21,006.78-13,621.89

Finding the Fourth Proportional to 15,218.07, 21,006.78 and 13,621.89

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Solution

The fourth proportional to 15,218.07, 21,006.78 and 13,621.89 is: 18,803.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,218.07 : 21,006.78 = 13,621.89 : x
  2. Step 2: Convert to fraction form
    15,218.07/21,006.78 = 13,621.89/x
  3. Step 3: Cross multiply
    15,218.07x = 21,006.78 × 13,621.89
  4. Step 4: Simplify right side
    15,218.07x = 286,152,046.41
  5. Step 5: Solve for x
    x = 286,152,046.41/15,218.07
  6. Step 6: Final answer
    x = 18,803.44

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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.