Home / 12,709.28-17,547.56-9,719.91

Finding the Fourth Proportional to 12,709.28, 17,547.56 and 9,719.91

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Solution

The fourth proportional to 12,709.28, 17,547.56 and 9,719.91 is: 13,420.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,709.28 : 17,547.56 = 9,719.91 : x
  2. Step 2: Convert to fraction form
    12,709.28/17,547.56 = 9,719.91/x
  3. Step 3: Cross multiply
    12,709.28x = 17,547.56 × 9,719.91
  4. Step 4: Simplify right side
    12,709.28x = 170,560,703.92
  5. Step 5: Solve for x
    x = 170,560,703.92/12,709.28
  6. Step 6: Final answer
    x = 13,420.17

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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.