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Finding the Fourth Proportional to 19,312.43, 28,964.99 and 9,445.55

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Solution

The fourth proportional to 19,312.43, 28,964.99 and 9,445.55 is: 14,166.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,312.43 : 28,964.99 = 9,445.55 : x
  2. Step 2: Convert to fraction form
    19,312.43/28,964.99 = 9,445.55/x
  3. Step 3: Cross multiply
    19,312.43x = 28,964.99 × 9,445.55
  4. Step 4: Simplify right side
    19,312.43x = 273,590,140.08
  5. Step 5: Solve for x
    x = 273,590,140.08/19,312.43
  6. Step 6: Final answer
    x = 14,166.53

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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.