Home / 13,554.84-18,705.38-7,890.60

Finding the Fourth Proportional to 13,554.84, 18,705.38 and 7,890.60

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Solution

The fourth proportional to 13,554.84, 18,705.38 and 7,890.60 is: 10,888.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,554.84 : 18,705.38 = 7,890.60 : x
  2. Step 2: Convert to fraction form
    13,554.84/18,705.38 = 7,890.60/x
  3. Step 3: Cross multiply
    13,554.84x = 18,705.38 × 7,890.60
  4. Step 4: Simplify right side
    13,554.84x = 147,596,671.43
  5. Step 5: Solve for x
    x = 147,596,671.43/13,554.84
  6. Step 6: Final answer
    x = 10,888.85

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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.