Home / 13,018-19,507.28-8,619.70

Finding the Fourth Proportional to 13,018, 19,507.28 and 8,619.70

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Solution

The fourth proportional to 13,018, 19,507.28 and 8,619.70 is: 12,916.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,018 : 19,507.28 = 8,619.70 : x
  2. Step 2: Convert to fraction form
    13,018/19,507.28 = 8,619.70/x
  3. Step 3: Cross multiply
    13,018x = 19,507.28 × 8,619.70
  4. Step 4: Simplify right side
    13,018x = 168,146,901.42
  5. Step 5: Solve for x
    x = 168,146,901.42/13,018
  6. Step 6: Final answer
    x = 12,916.49

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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.