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Finding the Fourth Proportional to 19,573.40, 29,368.80 and 7,909.40

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Solution

The fourth proportional to 19,573.40, 29,368.80 and 7,909.40 is: 11,867.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,573.40 : 29,368.80 = 7,909.40 : x
  2. Step 2: Convert to fraction form
    19,573.40/29,368.80 = 7,909.40/x
  3. Step 3: Cross multiply
    19,573.40x = 29,368.80 × 7,909.40
  4. Step 4: Simplify right side
    19,573.40x = 232,289,586.72
  5. Step 5: Solve for x
    x = 232,289,586.72/19,573.40
  6. Step 6: Final answer
    x = 11,867.62

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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.