Home / 15,318.48-21,140.64-8,604.72

Finding the Fourth Proportional to 15,318.48, 21,140.64 and 8,604.72

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Solution

The fourth proportional to 15,318.48, 21,140.64 and 8,604.72 is: 11,875.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,318.48 : 21,140.64 = 8,604.72 : x
  2. Step 2: Convert to fraction form
    15,318.48/21,140.64 = 8,604.72/x
  3. Step 3: Cross multiply
    15,318.48x = 21,140.64 × 8,604.72
  4. Step 4: Simplify right side
    15,318.48x = 181,909,287.82
  5. Step 5: Solve for x
    x = 181,909,287.82/15,318.48
  6. Step 6: Final answer
    x = 11,875.15

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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.