Home / 20,700.98-28,573.38-13,531.94

Finding the Fourth Proportional to 20,700.98, 28,573.38 and 13,531.94

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Solution

The fourth proportional to 20,700.98, 28,573.38 and 13,531.94 is: 18,678.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.98 : 28,573.38 = 13,531.94 : x
  2. Step 2: Convert to fraction form
    20,700.98/28,573.38 = 13,531.94/x
  3. Step 3: Cross multiply
    20,700.98x = 28,573.38 × 13,531.94
  4. Step 4: Simplify right side
    20,700.98x = 386,653,120.89
  5. Step 5: Solve for x
    x = 386,653,120.89/20,700.98
  6. Step 6: Final answer
    x = 18,678.01

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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.