Home / 20,838.07-28,756.98-11,406.64

Finding the Fourth Proportional to 20,838.07, 28,756.98 and 11,406.64

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Solution

The fourth proportional to 20,838.07, 28,756.98 and 11,406.64 is: 15,741.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.07 : 28,756.98 = 11,406.64 : x
  2. Step 2: Convert to fraction form
    20,838.07/28,756.98 = 11,406.64/x
  3. Step 3: Cross multiply
    20,838.07x = 28,756.98 × 11,406.64
  4. Step 4: Simplify right side
    20,838.07x = 328,020,518.35
  5. Step 5: Solve for x
    x = 328,020,518.35/20,838.07
  6. Step 6: Final answer
    x = 15,741.41

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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.