Home / 15,916.20-23,899.80-12,656.40

Finding the Fourth Proportional to 15,916.20, 23,899.80 and 12,656.40

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Solution

The fourth proportional to 15,916.20, 23,899.80 and 12,656.40 is: 19,004.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,916.20 : 23,899.80 = 12,656.40 : x
  2. Step 2: Convert to fraction form
    15,916.20/23,899.80 = 12,656.40/x
  3. Step 3: Cross multiply
    15,916.20x = 23,899.80 × 12,656.40
  4. Step 4: Simplify right side
    15,916.20x = 302,485,428.72
  5. Step 5: Solve for x
    x = 302,485,428.72/15,916.20
  6. Step 6: Final answer
    x = 19,004.88

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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.