Home / 13,387.68-18,477.59-7,726.08

Finding the Fourth Proportional to 13,387.68, 18,477.59 and 7,726.08

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Solution

The fourth proportional to 13,387.68, 18,477.59 and 7,726.08 is: 10,663.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.68 : 18,477.59 = 7,726.08 : x
  2. Step 2: Convert to fraction form
    13,387.68/18,477.59 = 7,726.08/x
  3. Step 3: Cross multiply
    13,387.68x = 18,477.59 × 7,726.08
  4. Step 4: Simplify right side
    13,387.68x = 142,759,369.21
  5. Step 5: Solve for x
    x = 142,759,369.21/13,387.68
  6. Step 6: Final answer
    x = 10,663.49

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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.