Home / 21,012.48-28,973.52-20,528.64

Finding the Fourth Proportional to 21,012.48, 28,973.52 and 20,528.64

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Solution

The fourth proportional to 21,012.48, 28,973.52 and 20,528.64 is: 28,306.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.48 : 28,973.52 = 20,528.64 : x
  2. Step 2: Convert to fraction form
    21,012.48/28,973.52 = 20,528.64/x
  3. Step 3: Cross multiply
    21,012.48x = 28,973.52 × 20,528.64
  4. Step 4: Simplify right side
    21,012.48x = 594,786,961.61
  5. Step 5: Solve for x
    x = 594,786,961.61/21,012.48
  6. Step 6: Final answer
    x = 28,306.37

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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.