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Finding the Fourth Proportional to 15,012.71, 20,719.29 and 12,490.37

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Solution

The fourth proportional to 15,012.71, 20,719.29 and 12,490.37 is: 17,238.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,012.71 : 20,719.29 = 12,490.37 : x
  2. Step 2: Convert to fraction form
    15,012.71/20,719.29 = 12,490.37/x
  3. Step 3: Cross multiply
    15,012.71x = 20,719.29 × 12,490.37
  4. Step 4: Simplify right side
    15,012.71x = 258,791,598.24
  5. Step 5: Solve for x
    x = 258,791,598.24/15,012.71
  6. Step 6: Final answer
    x = 17,238.17

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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.