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Finding the Fourth Proportional to 6,666.51, 9,199.80 and 4,013.40

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Solution

The fourth proportional to 6,666.51, 9,199.80 and 4,013.40 is: 5,538.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,666.51 : 9,199.80 = 4,013.40 : x
  2. Step 2: Convert to fraction form
    6,666.51/9,199.80 = 4,013.40/x
  3. Step 3: Cross multiply
    6,666.51x = 9,199.80 × 4,013.40
  4. Step 4: Simplify right side
    6,666.51x = 36,922,477.32
  5. Step 5: Solve for x
    x = 36,922,477.32/6,666.51
  6. Step 6: Final answer
    x = 5,538.50

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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.