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Finding the Fourth Proportional to 13,055.16, 18,015.86 and 7,390.98

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Solution

The fourth proportional to 13,055.16, 18,015.86 and 7,390.98 is: 10,199.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,055.16 : 18,015.86 = 7,390.98 : x
  2. Step 2: Convert to fraction form
    13,055.16/18,015.86 = 7,390.98/x
  3. Step 3: Cross multiply
    13,055.16x = 18,015.86 × 7,390.98
  4. Step 4: Simplify right side
    13,055.16x = 133,154,860.94
  5. Step 5: Solve for x
    x = 133,154,860.94/13,055.16
  6. Step 6: Final answer
    x = 10,199.40

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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.