Home / 15,641.28-21,577.64-11,390.49

Finding the Fourth Proportional to 15,641.28, 21,577.64 and 11,390.49

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Solution

The fourth proportional to 15,641.28, 21,577.64 and 11,390.49 is: 15,713.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,641.28 : 21,577.64 = 11,390.49 : x
  2. Step 2: Convert to fraction form
    15,641.28/21,577.64 = 11,390.49/x
  3. Step 3: Cross multiply
    15,641.28x = 21,577.64 × 11,390.49
  4. Step 4: Simplify right side
    15,641.28x = 245,779,835.69
  5. Step 5: Solve for x
    x = 245,779,835.69/15,641.28
  6. Step 6: Final answer
    x = 15,713.54

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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.