Home / 15,589.39-21,513.35-8,419.30

Finding the Fourth Proportional to 15,589.39, 21,513.35 and 8,419.30

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Solution

The fourth proportional to 15,589.39, 21,513.35 and 8,419.30 is: 11,618.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,589.39 : 21,513.35 = 8,419.30 : x
  2. Step 2: Convert to fraction form
    15,589.39/21,513.35 = 8,419.30/x
  3. Step 3: Cross multiply
    15,589.39x = 21,513.35 × 8,419.30
  4. Step 4: Simplify right side
    15,589.39x = 181,127,438.81
  5. Step 5: Solve for x
    x = 181,127,438.81/15,589.39
  6. Step 6: Final answer
    x = 11,618.64

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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.