Home / 28,437.69-39,243.76-15,690.99

Finding the Fourth Proportional to 28,437.69, 39,243.76 and 15,690.99

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Solution

The fourth proportional to 28,437.69, 39,243.76 and 15,690.99 is: 21,653.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,437.69 : 39,243.76 = 15,690.99 : x
  2. Step 2: Convert to fraction form
    28,437.69/39,243.76 = 15,690.99/x
  3. Step 3: Cross multiply
    28,437.69x = 39,243.76 × 15,690.99
  4. Step 4: Simplify right side
    28,437.69x = 615,773,553.66
  5. Step 5: Solve for x
    x = 615,773,553.66/28,437.69
  6. Step 6: Final answer
    x = 21,653.43

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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.