Home / 13,398.16-18,490.14-7,730.80

Finding the Fourth Proportional to 13,398.16, 18,490.14 and 7,730.80

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Solution

The fourth proportional to 13,398.16, 18,490.14 and 7,730.80 is: 10,668.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.16 : 18,490.14 = 7,730.80 : x
  2. Step 2: Convert to fraction form
    13,398.16/18,490.14 = 7,730.80/x
  3. Step 3: Cross multiply
    13,398.16x = 18,490.14 × 7,730.80
  4. Step 4: Simplify right side
    13,398.16x = 142,943,574.31
  5. Step 5: Solve for x
    x = 142,943,574.31/13,398.16
  6. Step 6: Final answer
    x = 10,668.90

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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.