Home / 28,436.74-39,243.10-15,690.48

Finding the Fourth Proportional to 28,436.74, 39,243.10 and 15,690.48

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Solution

The fourth proportional to 28,436.74, 39,243.10 and 15,690.48 is: 21,653.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,436.74 : 39,243.10 = 15,690.48 : x
  2. Step 2: Convert to fraction form
    28,436.74/39,243.10 = 15,690.48/x
  3. Step 3: Cross multiply
    28,436.74x = 39,243.10 × 15,690.48
  4. Step 4: Simplify right side
    28,436.74x = 615,743,075.69
  5. Step 5: Solve for x
    x = 615,743,075.69/28,436.74
  6. Step 6: Final answer
    x = 21,653.08

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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.