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Finding the Fourth Proportional to 19,011.60, 28,515.60 and 6,530.40

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Solution

The fourth proportional to 19,011.60, 28,515.60 and 6,530.40 is: 9,794.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,011.60 : 28,515.60 = 6,530.40 : x
  2. Step 2: Convert to fraction form
    19,011.60/28,515.60 = 6,530.40/x
  3. Step 3: Cross multiply
    19,011.60x = 28,515.60 × 6,530.40
  4. Step 4: Simplify right side
    19,011.60x = 186,218,274.24
  5. Step 5: Solve for x
    x = 186,218,274.24/19,011.60
  6. Step 6: Final answer
    x = 9,794.98

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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.