Home / 15,386.80-21,245.16-9,426.60

Finding the Fourth Proportional to 15,386.80, 21,245.16 and 9,426.60

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Solution

The fourth proportional to 15,386.80, 21,245.16 and 9,426.60 is: 13,015.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,386.80 : 21,245.16 = 9,426.60 : x
  2. Step 2: Convert to fraction form
    15,386.80/21,245.16 = 9,426.60/x
  3. Step 3: Cross multiply
    15,386.80x = 21,245.16 × 9,426.60
  4. Step 4: Simplify right side
    15,386.80x = 200,269,625.26
  5. Step 5: Solve for x
    x = 200,269,625.26/15,386.80
  6. Step 6: Final answer
    x = 13,015.68

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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.