Home / 15,389.17-21,230.40-9,719.98

Finding the Fourth Proportional to 15,389.17, 21,230.40 and 9,719.98

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Solution

The fourth proportional to 15,389.17, 21,230.40 and 9,719.98 is: 13,409.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.17 : 21,230.40 = 9,719.98 : x
  2. Step 2: Convert to fraction form
    15,389.17/21,230.40 = 9,719.98/x
  3. Step 3: Cross multiply
    15,389.17x = 21,230.40 × 9,719.98
  4. Step 4: Simplify right side
    15,389.17x = 206,359,063.39
  5. Step 5: Solve for x
    x = 206,359,063.39/15,389.17
  6. Step 6: Final answer
    x = 13,409.37

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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.