Home / 11,111.40-15,314.48-9,686.20

Finding the Fourth Proportional to 11,111.40, 15,314.48 and 9,686.20

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Solution

The fourth proportional to 11,111.40, 15,314.48 and 9,686.20 is: 13,350.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,111.40 : 15,314.48 = 9,686.20 : x
  2. Step 2: Convert to fraction form
    11,111.40/15,314.48 = 9,686.20/x
  3. Step 3: Cross multiply
    11,111.40x = 15,314.48 × 9,686.20
  4. Step 4: Simplify right side
    11,111.40x = 148,339,116.18
  5. Step 5: Solve for x
    x = 148,339,116.18/11,111.40
  6. Step 6: Final answer
    x = 13,350.17

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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.