Home / 14,135.40-21,203.10-12,148.20

Finding the Fourth Proportional to 14,135.40, 21,203.10 and 12,148.20

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Solution

The fourth proportional to 14,135.40, 21,203.10 and 12,148.20 is: 18,222.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,135.40 : 21,203.10 = 12,148.20 : x
  2. Step 2: Convert to fraction form
    14,135.40/21,203.10 = 12,148.20/x
  3. Step 3: Cross multiply
    14,135.40x = 21,203.10 × 12,148.20
  4. Step 4: Simplify right side
    14,135.40x = 257,579,499.42
  5. Step 5: Solve for x
    x = 257,579,499.42/14,135.40
  6. Step 6: Final answer
    x = 18,222.30

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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.