Home / 20,837.17-28,756.02-11,405.80

Finding the Fourth Proportional to 20,837.17, 28,756.02 and 11,405.80

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Solution

The fourth proportional to 20,837.17, 28,756.02 and 11,405.80 is: 15,740.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.17 : 28,756.02 = 11,405.80 : x
  2. Step 2: Convert to fraction form
    20,837.17/28,756.02 = 11,405.80/x
  3. Step 3: Cross multiply
    20,837.17x = 28,756.02 × 11,405.80
  4. Step 4: Simplify right side
    20,837.17x = 327,985,412.92
  5. Step 5: Solve for x
    x = 327,985,412.92/20,837.17
  6. Step 6: Final answer
    x = 15,740.40

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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.