Home / 21,328.56-29,431.08-15,030

Finding the Fourth Proportional to 21,328.56, 29,431.08 and 15,030

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Solution

The fourth proportional to 21,328.56, 29,431.08 and 15,030 is: 20,739.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.56 : 29,431.08 = 15,030 : x
  2. Step 2: Convert to fraction form
    21,328.56/29,431.08 = 15,030/x
  3. Step 3: Cross multiply
    21,328.56x = 29,431.08 × 15,030
  4. Step 4: Simplify right side
    21,328.56x = 442,349,132.40
  5. Step 5: Solve for x
    x = 442,349,132.40/21,328.56
  6. Step 6: Final answer
    x = 20,739.76

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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.