Home / 20,868.72-28,798.95-11,308.77

Finding the Fourth Proportional to 20,868.72, 28,798.95 and 11,308.77

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Solution

The fourth proportional to 20,868.72, 28,798.95 and 11,308.77 is: 15,606.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.72 : 28,798.95 = 11,308.77 : x
  2. Step 2: Convert to fraction form
    20,868.72/28,798.95 = 11,308.77/x
  3. Step 3: Cross multiply
    20,868.72x = 28,798.95 × 11,308.77
  4. Step 4: Simplify right side
    20,868.72x = 325,680,701.79
  5. Step 5: Solve for x
    x = 325,680,701.79/20,868.72
  6. Step 6: Final answer
    x = 15,606.17

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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.