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Finding the Fourth Proportional to 13,594.40, 18,774.53 and 9,356.40

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Solution

The fourth proportional to 13,594.40, 18,774.53 and 9,356.40 is: 12,921.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,594.40 : 18,774.53 = 9,356.40 : x
  2. Step 2: Convert to fraction form
    13,594.40/18,774.53 = 9,356.40/x
  3. Step 3: Cross multiply
    13,594.40x = 18,774.53 × 9,356.40
  4. Step 4: Simplify right side
    13,594.40x = 175,661,965.71
  5. Step 5: Solve for x
    x = 175,661,965.71/13,594.40
  6. Step 6: Final answer
    x = 12,921.65

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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.