Home / 21,019.46-28,990.45-13,466.49

Finding the Fourth Proportional to 21,019.46, 28,990.45 and 13,466.49

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Solution

The fourth proportional to 21,019.46, 28,990.45 and 13,466.49 is: 18,573.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,019.46 : 28,990.45 = 13,466.49 : x
  2. Step 2: Convert to fraction form
    21,019.46/28,990.45 = 13,466.49/x
  3. Step 3: Cross multiply
    21,019.46x = 28,990.45 × 13,466.49
  4. Step 4: Simplify right side
    21,019.46x = 390,399,605.02
  5. Step 5: Solve for x
    x = 390,399,605.02/21,019.46
  6. Step 6: Final answer
    x = 18,573.25

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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.