Home / 28,246.07-38,980.30-15,499.80

Finding the Fourth Proportional to 28,246.07, 38,980.30 and 15,499.80

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Solution

The fourth proportional to 28,246.07, 38,980.30 and 15,499.80 is: 21,390.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,246.07 : 38,980.30 = 15,499.80 : x
  2. Step 2: Convert to fraction form
    28,246.07/38,980.30 = 15,499.80/x
  3. Step 3: Cross multiply
    28,246.07x = 38,980.30 × 15,499.80
  4. Step 4: Simplify right side
    28,246.07x = 604,186,853.94
  5. Step 5: Solve for x
    x = 604,186,853.94/28,246.07
  6. Step 6: Final answer
    x = 21,390.12

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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.