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Finding the Fourth Proportional to 19,303.88, 28,922.72 and 12,966.88

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Solution

The fourth proportional to 19,303.88, 28,922.72 and 12,966.88 is: 19,428.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,303.88 : 28,922.72 = 12,966.88 : x
  2. Step 2: Convert to fraction form
    19,303.88/28,922.72 = 12,966.88/x
  3. Step 3: Cross multiply
    19,303.88x = 28,922.72 × 12,966.88
  4. Step 4: Simplify right side
    19,303.88x = 375,037,439.51
  5. Step 5: Solve for x
    x = 375,037,439.51/19,303.88
  6. Step 6: Final answer
    x = 19,428.09

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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.