Home / 20,838.08-28,756.52-11,406.64

Finding the Fourth Proportional to 20,838.08, 28,756.52 and 11,406.64

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Solution

The fourth proportional to 20,838.08, 28,756.52 and 11,406.64 is: 15,741.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.08 : 28,756.52 = 11,406.64 : x
  2. Step 2: Convert to fraction form
    20,838.08/28,756.52 = 11,406.64/x
  3. Step 3: Cross multiply
    20,838.08x = 28,756.52 × 11,406.64
  4. Step 4: Simplify right side
    20,838.08x = 328,015,271.29
  5. Step 5: Solve for x
    x = 328,015,271.29/20,838.08
  6. Step 6: Final answer
    x = 15,741.15

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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.