Home / 21,290.78-29,345.28-14,564.81

Finding the Fourth Proportional to 21,290.78, 29,345.28 and 14,564.81

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Solution

The fourth proportional to 21,290.78, 29,345.28 and 14,564.81 is: 20,074.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.78 : 29,345.28 = 14,564.81 : x
  2. Step 2: Convert to fraction form
    21,290.78/29,345.28 = 14,564.81/x
  3. Step 3: Cross multiply
    21,290.78x = 29,345.28 × 14,564.81
  4. Step 4: Simplify right side
    21,290.78x = 427,408,427.60
  5. Step 5: Solve for x
    x = 427,408,427.60/21,290.78
  6. Step 6: Final answer
    x = 20,074.81

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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.