Home / 15,630.72-21,580.80-12,287.04

Finding the Fourth Proportional to 15,630.72, 21,580.80 and 12,287.04

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Solution

The fourth proportional to 15,630.72, 21,580.80 and 12,287.04 is: 16,964.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,630.72 : 21,580.80 = 12,287.04 : x
  2. Step 2: Convert to fraction form
    15,630.72/21,580.80 = 12,287.04/x
  3. Step 3: Cross multiply
    15,630.72x = 21,580.80 × 12,287.04
  4. Step 4: Simplify right side
    15,630.72x = 265,164,152.83
  5. Step 5: Solve for x
    x = 265,164,152.83/15,630.72
  6. Step 6: Final answer
    x = 16,964.30

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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.