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Finding the Fourth Proportional to 9,886.19, 13,642.94 and 5,409.94

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Solution

The fourth proportional to 9,886.19, 13,642.94 and 5,409.94 is: 7,465.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,886.19 : 13,642.94 = 5,409.94 : x
  2. Step 2: Convert to fraction form
    9,886.19/13,642.94 = 5,409.94/x
  3. Step 3: Cross multiply
    9,886.19x = 13,642.94 × 5,409.94
  4. Step 4: Simplify right side
    9,886.19x = 73,807,570.18
  5. Step 5: Solve for x
    x = 73,807,570.18/9,886.19
  6. Step 6: Final answer
    x = 7,465.72

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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.