Home / 15,218.04-21,010.80-13,621.92

Finding the Fourth Proportional to 15,218.04, 21,010.80 and 13,621.92

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Solution

The fourth proportional to 15,218.04, 21,010.80 and 13,621.92 is: 18,807.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,218.04 : 21,010.80 = 13,621.92 : x
  2. Step 2: Convert to fraction form
    15,218.04/21,010.80 = 13,621.92/x
  3. Step 3: Cross multiply
    15,218.04x = 21,010.80 × 13,621.92
  4. Step 4: Simplify right side
    15,218.04x = 286,207,436.74
  5. Step 5: Solve for x
    x = 286,207,436.74/15,218.04
  6. Step 6: Final answer
    x = 18,807.12

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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.