Home / 20,669.86-28,526.16-11,719

Finding the Fourth Proportional to 20,669.86, 28,526.16 and 11,719

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Solution

The fourth proportional to 20,669.86, 28,526.16 and 11,719 is: 16,173.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.86 : 28,526.16 = 11,719 : x
  2. Step 2: Convert to fraction form
    20,669.86/28,526.16 = 11,719/x
  3. Step 3: Cross multiply
    20,669.86x = 28,526.16 × 11,719
  4. Step 4: Simplify right side
    20,669.86x = 334,298,069.04
  5. Step 5: Solve for x
    x = 334,298,069.04/20,669.86
  6. Step 6: Final answer
    x = 16,173.21

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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.