Home / 10,805.19-14,890.80-7,815.95

Finding the Fourth Proportional to 10,805.19, 14,890.80 and 7,815.95

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Solution

The fourth proportional to 10,805.19, 14,890.80 and 7,815.95 is: 10,771.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,805.19 : 14,890.80 = 7,815.95 : x
  2. Step 2: Convert to fraction form
    10,805.19/14,890.80 = 7,815.95/x
  3. Step 3: Cross multiply
    10,805.19x = 14,890.80 × 7,815.95
  4. Step 4: Simplify right side
    10,805.19x = 116,385,748.26
  5. Step 5: Solve for x
    x = 116,385,748.26/10,805.19
  6. Step 6: Final answer
    x = 10,771.28

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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.