Home / 20,926.95-28,875.25-12,971.13

Finding the Fourth Proportional to 20,926.95, 28,875.25 and 12,971.13

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Solution

The fourth proportional to 20,926.95, 28,875.25 and 12,971.13 is: 17,897.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.95 : 28,875.25 = 12,971.13 : x
  2. Step 2: Convert to fraction form
    20,926.95/28,875.25 = 12,971.13/x
  3. Step 3: Cross multiply
    20,926.95x = 28,875.25 × 12,971.13
  4. Step 4: Simplify right side
    20,926.95x = 374,544,621.53
  5. Step 5: Solve for x
    x = 374,544,621.53/20,926.95
  6. Step 6: Final answer
    x = 17,897.72

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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.