Home / 15,444.11-21,301.62-9,779.78

Finding the Fourth Proportional to 15,444.11, 21,301.62 and 9,779.78

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Solution

The fourth proportional to 15,444.11, 21,301.62 and 9,779.78 is: 13,488.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,444.11 : 21,301.62 = 9,779.78 : x
  2. Step 2: Convert to fraction form
    15,444.11/21,301.62 = 9,779.78/x
  3. Step 3: Cross multiply
    15,444.11x = 21,301.62 × 9,779.78
  4. Step 4: Simplify right side
    15,444.11x = 208,325,157.24
  5. Step 5: Solve for x
    x = 208,325,157.24/15,444.11
  6. Step 6: Final answer
    x = 13,488.97

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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.