Home / 15,585.44-21,501.76-9,918.72

Finding the Fourth Proportional to 15,585.44, 21,501.76 and 9,918.72

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Solution

The fourth proportional to 15,585.44, 21,501.76 and 9,918.72 is: 13,683.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,585.44 : 21,501.76 = 9,918.72 : x
  2. Step 2: Convert to fraction form
    15,585.44/21,501.76 = 9,918.72/x
  3. Step 3: Cross multiply
    15,585.44x = 21,501.76 × 9,918.72
  4. Step 4: Simplify right side
    15,585.44x = 213,269,936.95
  5. Step 5: Solve for x
    x = 213,269,936.95/15,585.44
  6. Step 6: Final answer
    x = 13,683.92

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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.