Home / 7,890.90-11,836.35-5,412.30

Finding the Fourth Proportional to 7,890.90, 11,836.35 and 5,412.30

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Solution

The fourth proportional to 7,890.90, 11,836.35 and 5,412.30 is: 8,118.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.90 : 11,836.35 = 5,412.30 : x
  2. Step 2: Convert to fraction form
    7,890.90/11,836.35 = 5,412.30/x
  3. Step 3: Cross multiply
    7,890.90x = 11,836.35 × 5,412.30
  4. Step 4: Simplify right side
    7,890.90x = 64,061,877.11
  5. Step 5: Solve for x
    x = 64,061,877.11/7,890.90
  6. Step 6: Final answer
    x = 8,118.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.