Home / 19,018.72-26,242.20-12,312.88

Finding the Fourth Proportional to 19,018.72, 26,242.20 and 12,312.88

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Solution

The fourth proportional to 19,018.72, 26,242.20 and 12,312.88 is: 16,989.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,018.72 : 26,242.20 = 12,312.88 : x
  2. Step 2: Convert to fraction form
    19,018.72/26,242.20 = 12,312.88/x
  3. Step 3: Cross multiply
    19,018.72x = 26,242.20 × 12,312.88
  4. Step 4: Simplify right side
    19,018.72x = 323,117,059.54
  5. Step 5: Solve for x
    x = 323,117,059.54/19,018.72
  6. Step 6: Final answer
    x = 16,989.42

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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.