Home / 8,990.21-12,406.65-5,010.89

Finding the Fourth Proportional to 8,990.21, 12,406.65 and 5,010.89

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Solution

The fourth proportional to 8,990.21, 12,406.65 and 5,010.89 is: 6,915.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.21 : 12,406.65 = 5,010.89 : x
  2. Step 2: Convert to fraction form
    8,990.21/12,406.65 = 5,010.89/x
  3. Step 3: Cross multiply
    8,990.21x = 12,406.65 × 5,010.89
  4. Step 4: Simplify right side
    8,990.21x = 62,168,333.36
  5. Step 5: Solve for x
    x = 62,168,333.36/8,990.21
  6. Step 6: Final answer
    x = 6,915.12

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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.