Home / 13,930.63-19,224.21-7,642.87

Finding the Fourth Proportional to 13,930.63, 19,224.21 and 7,642.87

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Solution

The fourth proportional to 13,930.63, 19,224.21 and 7,642.87 is: 10,547.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,930.63 : 19,224.21 = 7,642.87 : x
  2. Step 2: Convert to fraction form
    13,930.63/19,224.21 = 7,642.87/x
  3. Step 3: Cross multiply
    13,930.63x = 19,224.21 × 7,642.87
  4. Step 4: Simplify right side
    13,930.63x = 146,928,137.88
  5. Step 5: Solve for x
    x = 146,928,137.88/13,930.63
  6. Step 6: Final answer
    x = 10,547.13

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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.