Home / 15,420.65-21,280.39-8,706.22

Finding the Fourth Proportional to 15,420.65, 21,280.39 and 8,706.22

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Solution

The fourth proportional to 15,420.65, 21,280.39 and 8,706.22 is: 12,014.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.65 : 21,280.39 = 8,706.22 : x
  2. Step 2: Convert to fraction form
    15,420.65/21,280.39 = 8,706.22/x
  3. Step 3: Cross multiply
    15,420.65x = 21,280.39 × 8,706.22
  4. Step 4: Simplify right side
    15,420.65x = 185,271,682.06
  5. Step 5: Solve for x
    x = 185,271,682.06/15,420.65
  6. Step 6: Final answer
    x = 12,014.52

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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.