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Finding the Fourth Proportional to 9,859.36, 14,718.44 and 9,139.36

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Solution

The fourth proportional to 9,859.36, 14,718.44 and 9,139.36 is: 13,643.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,859.36 : 14,718.44 = 9,139.36 : x
  2. Step 2: Convert to fraction form
    9,859.36/14,718.44 = 9,139.36/x
  3. Step 3: Cross multiply
    9,859.36x = 14,718.44 × 9,139.36
  4. Step 4: Simplify right side
    9,859.36x = 134,517,121.80
  5. Step 5: Solve for x
    x = 134,517,121.80/9,859.36
  6. Step 6: Final answer
    x = 13,643.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.