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Finding the Fourth Proportional to 13,598.90, 18,780.74 and 9,360.90

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Solution

The fourth proportional to 13,598.90, 18,780.74 and 9,360.90 is: 12,927.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,598.90 : 18,780.74 = 9,360.90 : x
  2. Step 2: Convert to fraction form
    13,598.90/18,780.74 = 9,360.90/x
  3. Step 3: Cross multiply
    13,598.90x = 18,780.74 × 9,360.90
  4. Step 4: Simplify right side
    13,598.90x = 175,804,582.26
  5. Step 5: Solve for x
    x = 175,804,582.26/13,598.90
  6. Step 6: Final answer
    x = 12,927.86

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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.