Home / 13,607.05-18,776.45-7,637.55

Finding the Fourth Proportional to 13,607.05, 18,776.45 and 7,637.55

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Solution

The fourth proportional to 13,607.05, 18,776.45 and 7,637.55 is: 10,539.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.05 : 18,776.45 = 7,637.55 : x
  2. Step 2: Convert to fraction form
    13,607.05/18,776.45 = 7,637.55/x
  3. Step 3: Cross multiply
    13,607.05x = 18,776.45 × 7,637.55
  4. Step 4: Simplify right side
    13,607.05x = 143,406,122.24
  5. Step 5: Solve for x
    x = 143,406,122.24/13,607.05
  6. Step 6: Final answer
    x = 10,539.10

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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.