Home / 21,019.53-28,990.54-13,466.56

Finding the Fourth Proportional to 21,019.53, 28,990.54 and 13,466.56

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Solution

The fourth proportional to 21,019.53, 28,990.54 and 13,466.56 is: 18,573.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,019.53 : 28,990.54 = 13,466.56 : x
  2. Step 2: Convert to fraction form
    21,019.53/28,990.54 = 13,466.56/x
  3. Step 3: Cross multiply
    21,019.53x = 28,990.54 × 13,466.56
  4. Step 4: Simplify right side
    21,019.53x = 390,402,843.77
  5. Step 5: Solve for x
    x = 390,402,843.77/21,019.53
  6. Step 6: Final answer
    x = 18,573.34

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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.