Home / 12,900.64-19,349.70-4,133.20

Finding the Fourth Proportional to 12,900.64, 19,349.70 and 4,133.20

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Solution

The fourth proportional to 12,900.64, 19,349.70 and 4,133.20 is: 6,199.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,900.64 : 19,349.70 = 4,133.20 : x
  2. Step 2: Convert to fraction form
    12,900.64/19,349.70 = 4,133.20/x
  3. Step 3: Cross multiply
    12,900.64x = 19,349.70 × 4,133.20
  4. Step 4: Simplify right side
    12,900.64x = 79,976,180.04
  5. Step 5: Solve for x
    x = 79,976,180.04/12,900.64
  6. Step 6: Final answer
    x = 6,199.40

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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.