Home / 20,477.10-30,666.42-11,685.36

Finding the Fourth Proportional to 20,477.10, 30,666.42 and 11,685.36

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Solution

The fourth proportional to 20,477.10, 30,666.42 and 11,685.36 is: 17,499.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,477.10 : 30,666.42 = 11,685.36 : x
  2. Step 2: Convert to fraction form
    20,477.10/30,666.42 = 11,685.36/x
  3. Step 3: Cross multiply
    20,477.10x = 30,666.42 × 11,685.36
  4. Step 4: Simplify right side
    20,477.10x = 358,348,157.61
  5. Step 5: Solve for x
    x = 358,348,157.61/20,477.10
  6. Step 6: Final answer
    x = 17,499.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.