Home / 20,852.63-28,776.62-11,421.53

Finding the Fourth Proportional to 20,852.63, 28,776.62 and 11,421.53

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Solution

The fourth proportional to 20,852.63, 28,776.62 and 11,421.53 is: 15,761.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.63 : 28,776.62 = 11,421.53 : x
  2. Step 2: Convert to fraction form
    20,852.63/28,776.62 = 11,421.53/x
  3. Step 3: Cross multiply
    20,852.63x = 28,776.62 × 11,421.53
  4. Step 4: Simplify right side
    20,852.63x = 328,672,913.30
  5. Step 5: Solve for x
    x = 328,672,913.30/20,852.63
  6. Step 6: Final answer
    x = 15,761.70

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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.