Home / 15,681.60-21,641.31-8,608.68

Finding the Fourth Proportional to 15,681.60, 21,641.31 and 8,608.68

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Solution

The fourth proportional to 15,681.60, 21,641.31 and 8,608.68 is: 11,880.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,681.60 : 21,641.31 = 8,608.68 : x
  2. Step 2: Convert to fraction form
    15,681.60/21,641.31 = 8,608.68/x
  3. Step 3: Cross multiply
    15,681.60x = 21,641.31 × 8,608.68
  4. Step 4: Simplify right side
    15,681.60x = 186,303,112.57
  5. Step 5: Solve for x
    x = 186,303,112.57/15,681.60
  6. Step 6: Final answer
    x = 11,880.36

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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.