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Finding the Fourth Proportional to 13,730.68, 18,948.36 and 7,443.07

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Solution

The fourth proportional to 13,730.68, 18,948.36 and 7,443.07 is: 10,271.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,730.68 : 18,948.36 = 7,443.07 : x
  2. Step 2: Convert to fraction form
    13,730.68/18,948.36 = 7,443.07/x
  3. Step 3: Cross multiply
    13,730.68x = 18,948.36 × 7,443.07
  4. Step 4: Simplify right side
    13,730.68x = 141,033,969.87
  5. Step 5: Solve for x
    x = 141,033,969.87/13,730.68
  6. Step 6: Final answer
    x = 10,271.45

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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.