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Finding the Fourth Proportional to 19,309.66, 28,964.13 and 12,970.06

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Solution

The fourth proportional to 19,309.66, 28,964.13 and 12,970.06 is: 19,454.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,309.66 : 28,964.13 = 12,970.06 : x
  2. Step 2: Convert to fraction form
    19,309.66/28,964.13 = 12,970.06/x
  3. Step 3: Cross multiply
    19,309.66x = 28,964.13 × 12,970.06
  4. Step 4: Simplify right side
    19,309.66x = 375,666,503.95
  5. Step 5: Solve for x
    x = 375,666,503.95/19,309.66
  6. Step 6: Final answer
    x = 19,454.85

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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.