Home / 20,653.72-28,501.50-11,222.08

Finding the Fourth Proportional to 20,653.72, 28,501.50 and 11,222.08

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Solution

The fourth proportional to 20,653.72, 28,501.50 and 11,222.08 is: 15,486.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.72 : 28,501.50 = 11,222.08 : x
  2. Step 2: Convert to fraction form
    20,653.72/28,501.50 = 11,222.08/x
  3. Step 3: Cross multiply
    20,653.72x = 28,501.50 × 11,222.08
  4. Step 4: Simplify right side
    20,653.72x = 319,846,113.12
  5. Step 5: Solve for x
    x = 319,846,113.12/20,653.72
  6. Step 6: Final answer
    x = 15,486.13

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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.