Home / 20,721.02-28,595.56-11,290.18

Finding the Fourth Proportional to 20,721.02, 28,595.56 and 11,290.18

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Solution

The fourth proportional to 20,721.02, 28,595.56 and 11,290.18 is: 15,580.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.02 : 28,595.56 = 11,290.18 : x
  2. Step 2: Convert to fraction form
    20,721.02/28,595.56 = 11,290.18/x
  3. Step 3: Cross multiply
    20,721.02x = 28,595.56 × 11,290.18
  4. Step 4: Simplify right side
    20,721.02x = 322,849,019.60
  5. Step 5: Solve for x
    x = 322,849,019.60/20,721.02
  6. Step 6: Final answer
    x = 15,580.75

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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.