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Finding the Fourth Proportional to 13,598.40, 18,780.05 and 9,360.40

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Solution

The fourth proportional to 13,598.40, 18,780.05 and 9,360.40 is: 12,927.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,598.40 : 18,780.05 = 9,360.40 : x
  2. Step 2: Convert to fraction form
    13,598.40/18,780.05 = 9,360.40/x
  3. Step 3: Cross multiply
    13,598.40x = 18,780.05 × 9,360.40
  4. Step 4: Simplify right side
    13,598.40x = 175,788,780.02
  5. Step 5: Solve for x
    x = 175,788,780.02/13,598.40
  6. Step 6: Final answer
    x = 12,927.17

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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.