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Finding the Fourth Proportional to 14,018.56, 19,345.56 and 7,731.28

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Solution

The fourth proportional to 14,018.56, 19,345.56 and 7,731.28 is: 10,669.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,018.56 : 19,345.56 = 7,731.28 : x
  2. Step 2: Convert to fraction form
    14,018.56/19,345.56 = 7,731.28/x
  3. Step 3: Cross multiply
    14,018.56x = 19,345.56 × 7,731.28
  4. Step 4: Simplify right side
    14,018.56x = 149,565,941.12
  5. Step 5: Solve for x
    x = 149,565,941.12/14,018.56
  6. Step 6: Final answer
    x = 10,669.14

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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.