Home / 10,521.02-15,778.40-8,667.54

Finding the Fourth Proportional to 10,521.02, 15,778.40 and 8,667.54

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Solution

The fourth proportional to 10,521.02, 15,778.40 and 8,667.54 is: 12,998.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.02 : 15,778.40 = 8,667.54 : x
  2. Step 2: Convert to fraction form
    10,521.02/15,778.40 = 8,667.54/x
  3. Step 3: Cross multiply
    10,521.02x = 15,778.40 × 8,667.54
  4. Step 4: Simplify right side
    10,521.02x = 136,759,869.80
  5. Step 5: Solve for x
    x = 136,759,869.80/10,521.02
  6. Step 6: Final answer
    x = 12,998.72

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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.