Home / 28,020-42,016.32-13,216.44

Finding the Fourth Proportional to 28,020, 42,016.32 and 13,216.44

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Solution

The fourth proportional to 28,020, 42,016.32 and 13,216.44 is: 19,818.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,020 : 42,016.32 = 13,216.44 : x
  2. Step 2: Convert to fraction form
    28,020/42,016.32 = 13,216.44/x
  3. Step 3: Cross multiply
    28,020x = 42,016.32 × 13,216.44
  4. Step 4: Simplify right side
    28,020x = 555,306,172.30
  5. Step 5: Solve for x
    x = 555,306,172.30/28,020
  6. Step 6: Final answer
    x = 19,818.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.