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Finding the Fourth Proportional to 15,745, 21,726.21 and 9,030.28

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Solution

The fourth proportional to 15,745, 21,726.21 and 9,030.28 is: 12,460.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745 : 21,726.21 = 9,030.28 : x
  2. Step 2: Convert to fraction form
    15,745/21,726.21 = 9,030.28/x
  3. Step 3: Cross multiply
    15,745x = 21,726.21 × 9,030.28
  4. Step 4: Simplify right side
    15,745x = 196,193,759.64
  5. Step 5: Solve for x
    x = 196,193,759.64/15,745
  6. Step 6: Final answer
    x = 12,460.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.