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Finding the Fourth Proportional to 19,312.92, 28,796.40 and 18,963

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Solution

The fourth proportional to 19,312.92, 28,796.40 and 18,963 is: 28,274.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,312.92 : 28,796.40 = 18,963 : x
  2. Step 2: Convert to fraction form
    19,312.92/28,796.40 = 18,963/x
  3. Step 3: Cross multiply
    19,312.92x = 28,796.40 × 18,963
  4. Step 4: Simplify right side
    19,312.92x = 546,066,133.20
  5. Step 5: Solve for x
    x = 546,066,133.20/19,312.92
  6. Step 6: Final answer
    x = 28,274.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.