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Finding the Fourth Proportional to 12,955.47, 19,332.17 and 11,559.21

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Solution

The fourth proportional to 12,955.47, 19,332.17 and 11,559.21 is: 17,248.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,955.47 : 19,332.17 = 11,559.21 : x
  2. Step 2: Convert to fraction form
    12,955.47/19,332.17 = 11,559.21/x
  3. Step 3: Cross multiply
    12,955.47x = 19,332.17 × 11,559.21
  4. Step 4: Simplify right side
    12,955.47x = 223,464,685.28
  5. Step 5: Solve for x
    x = 223,464,685.28/12,955.47
  6. Step 6: Final answer
    x = 17,248.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.