Home / 15,119.34-20,809.61-13,315.02

Finding the Fourth Proportional to 15,119.34, 20,809.61 and 13,315.02

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Solution

The fourth proportional to 15,119.34, 20,809.61 and 13,315.02 is: 18,326.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,119.34 : 20,809.61 = 13,315.02 : x
  2. Step 2: Convert to fraction form
    15,119.34/20,809.61 = 13,315.02/x
  3. Step 3: Cross multiply
    15,119.34x = 20,809.61 × 13,315.02
  4. Step 4: Simplify right side
    15,119.34x = 277,080,306.77
  5. Step 5: Solve for x
    x = 277,080,306.77/15,119.34
  6. Step 6: Final answer
    x = 18,326.22

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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.