Home / 13,389.84-18,478.80-7,726.32

Finding the Fourth Proportional to 13,389.84, 18,478.80 and 7,726.32

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Solution

The fourth proportional to 13,389.84, 18,478.80 and 7,726.32 is: 10,662.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.84 : 18,478.80 = 7,726.32 : x
  2. Step 2: Convert to fraction form
    13,389.84/18,478.80 = 7,726.32/x
  3. Step 3: Cross multiply
    13,389.84x = 18,478.80 × 7,726.32
  4. Step 4: Simplify right side
    13,389.84x = 142,773,122.02
  5. Step 5: Solve for x
    x = 142,773,122.02/13,389.84
  6. Step 6: Final answer
    x = 10,662.80

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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.