Home / 13,176.81-18,182.21-7,870.50

Finding the Fourth Proportional to 13,176.81, 18,182.21 and 7,870.50

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Solution

The fourth proportional to 13,176.81, 18,182.21 and 7,870.50 is: 10,860.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,176.81 : 18,182.21 = 7,870.50 : x
  2. Step 2: Convert to fraction form
    13,176.81/18,182.21 = 7,870.50/x
  3. Step 3: Cross multiply
    13,176.81x = 18,182.21 × 7,870.50
  4. Step 4: Simplify right side
    13,176.81x = 143,103,044.45
  5. Step 5: Solve for x
    x = 143,103,044.45/13,176.81
  6. Step 6: Final answer
    x = 10,860.22

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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.