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Finding the Fourth Proportional to 20,799.68, 28,703.68 and 11,368.46

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Solution

The fourth proportional to 20,799.68, 28,703.68 and 11,368.46 is: 15,688.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.68 : 28,703.68 = 11,368.46 : x
  2. Step 2: Convert to fraction form
    20,799.68/28,703.68 = 11,368.46/x
  3. Step 3: Cross multiply
    20,799.68x = 28,703.68 × 11,368.46
  4. Step 4: Simplify right side
    20,799.68x = 326,316,637.93
  5. Step 5: Solve for x
    x = 326,316,637.93/20,799.68
  6. Step 6: Final answer
    x = 15,688.54

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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.