Home / 15,330.58-21,154.89-8,615.68

Finding the Fourth Proportional to 15,330.58, 21,154.89 and 8,615.68

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Solution

The fourth proportional to 15,330.58, 21,154.89 and 8,615.68 is: 11,888.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,330.58 : 21,154.89 = 8,615.68 : x
  2. Step 2: Convert to fraction form
    15,330.58/21,154.89 = 8,615.68/x
  3. Step 3: Cross multiply
    15,330.58x = 21,154.89 × 8,615.68
  4. Step 4: Simplify right side
    15,330.58x = 182,263,762.68
  5. Step 5: Solve for x
    x = 182,263,762.68/15,330.58
  6. Step 6: Final answer
    x = 11,888.90

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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.