Home / 13,553.58-18,721.81-10,405.77

Finding the Fourth Proportional to 13,553.58, 18,721.81 and 10,405.77

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Solution

The fourth proportional to 13,553.58, 18,721.81 and 10,405.77 is: 14,373.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,553.58 : 18,721.81 = 10,405.77 : x
  2. Step 2: Convert to fraction form
    13,553.58/18,721.81 = 10,405.77/x
  3. Step 3: Cross multiply
    13,553.58x = 18,721.81 × 10,405.77
  4. Step 4: Simplify right side
    13,553.58x = 194,814,848.84
  5. Step 5: Solve for x
    x = 194,814,848.84/13,553.58
  6. Step 6: Final answer
    x = 14,373.68

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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.