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Finding the Fourth Proportional to 9,888.01, 13,646.99 and 5,639.08

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Solution

The fourth proportional to 9,888.01, 13,646.99 and 5,639.08 is: 7,782.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,888.01 : 13,646.99 = 5,639.08 : x
  2. Step 2: Convert to fraction form
    9,888.01/13,646.99 = 5,639.08/x
  3. Step 3: Cross multiply
    9,888.01x = 13,646.99 × 5,639.08
  4. Step 4: Simplify right side
    9,888.01x = 76,956,468.37
  5. Step 5: Solve for x
    x = 76,956,468.37/9,888.01
  6. Step 6: Final answer
    x = 7,782.81

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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.