Home / 12,315.68-18,466.88-5,382.08

Finding the Fourth Proportional to 12,315.68, 18,466.88 and 5,382.08

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Solution

The fourth proportional to 12,315.68, 18,466.88 and 5,382.08 is: 8,070.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,315.68 : 18,466.88 = 5,382.08 : x
  2. Step 2: Convert to fraction form
    12,315.68/18,466.88 = 5,382.08/x
  3. Step 3: Cross multiply
    12,315.68x = 18,466.88 × 5,382.08
  4. Step 4: Simplify right side
    12,315.68x = 99,390,225.51
  5. Step 5: Solve for x
    x = 99,390,225.51/12,315.68
  6. Step 6: Final answer
    x = 8,070.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.