Home / 13,555.84-18,706.76-7,891.60

Finding the Fourth Proportional to 13,555.84, 18,706.76 and 7,891.60

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Solution

The fourth proportional to 13,555.84, 18,706.76 and 7,891.60 is: 10,890.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,555.84 : 18,706.76 = 7,891.60 : x
  2. Step 2: Convert to fraction form
    13,555.84/18,706.76 = 7,891.60/x
  3. Step 3: Cross multiply
    13,555.84x = 18,706.76 × 7,891.60
  4. Step 4: Simplify right side
    13,555.84x = 147,626,267.22
  5. Step 5: Solve for x
    x = 147,626,267.22/13,555.84
  6. Step 6: Final answer
    x = 10,890.23

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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.