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Finding the Fourth Proportional to 15,030.68, 20,738.60 and 9,719.10

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Solution

The fourth proportional to 15,030.68, 20,738.60 and 9,719.10 is: 13,409.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,030.68 : 20,738.60 = 9,719.10 : x
  2. Step 2: Convert to fraction form
    15,030.68/20,738.60 = 9,719.10/x
  3. Step 3: Cross multiply
    15,030.68x = 20,738.60 × 9,719.10
  4. Step 4: Simplify right side
    15,030.68x = 201,560,478.66
  5. Step 5: Solve for x
    x = 201,560,478.66/15,030.68
  6. Step 6: Final answer
    x = 13,409.94

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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.