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Finding the Fourth Proportional to 19,314.20, 28,971.30 and 15,426.20

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Solution

The fourth proportional to 19,314.20, 28,971.30 and 15,426.20 is: 23,139.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,314.20 : 28,971.30 = 15,426.20 : x
  2. Step 2: Convert to fraction form
    19,314.20/28,971.30 = 15,426.20/x
  3. Step 3: Cross multiply
    19,314.20x = 28,971.30 × 15,426.20
  4. Step 4: Simplify right side
    19,314.20x = 446,917,068.06
  5. Step 5: Solve for x
    x = 446,917,068.06/19,314.20
  6. Step 6: Final answer
    x = 23,139.30

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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.