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Finding the Fourth Proportional to 21,798.60, 32,654.70 and 13,007.40

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Solution

The fourth proportional to 21,798.60, 32,654.70 and 13,007.40 is: 19,485.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,798.60 : 32,654.70 = 13,007.40 : x
  2. Step 2: Convert to fraction form
    21,798.60/32,654.70 = 13,007.40/x
  3. Step 3: Cross multiply
    21,798.60x = 32,654.70 × 13,007.40
  4. Step 4: Simplify right side
    21,798.60x = 424,752,744.78
  5. Step 5: Solve for x
    x = 424,752,744.78/21,798.60
  6. Step 6: Final answer
    x = 19,485.32

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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.