Home / 15,420.46-21,280.16-8,706.02

Finding the Fourth Proportional to 15,420.46, 21,280.16 and 8,706.02

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Solution

The fourth proportional to 15,420.46, 21,280.16 and 8,706.02 is: 12,014.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.46 : 21,280.16 = 8,706.02 : x
  2. Step 2: Convert to fraction form
    15,420.46/21,280.16 = 8,706.02/x
  3. Step 3: Cross multiply
    15,420.46x = 21,280.16 × 8,706.02
  4. Step 4: Simplify right side
    15,420.46x = 185,265,498.56
  5. Step 5: Solve for x
    x = 185,265,498.56/15,420.46
  6. Step 6: Final answer
    x = 12,014.27

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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.