Home / 10,421.90-14,382.10-5,706.12

Finding the Fourth Proportional to 10,421.90, 14,382.10 and 5,706.12

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Solution

The fourth proportional to 10,421.90, 14,382.10 and 5,706.12 is: 7,874.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.90 : 14,382.10 = 5,706.12 : x
  2. Step 2: Convert to fraction form
    10,421.90/14,382.10 = 5,706.12/x
  3. Step 3: Cross multiply
    10,421.90x = 14,382.10 × 5,706.12
  4. Step 4: Simplify right side
    10,421.90x = 82,065,988.45
  5. Step 5: Solve for x
    x = 82,065,988.45/10,421.90
  6. Step 6: Final answer
    x = 7,874.38

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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.