Home / 12,386.02-18,578.80-4,990.29

Finding the Fourth Proportional to 12,386.02, 18,578.80 and 4,990.29

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Solution

The fourth proportional to 12,386.02, 18,578.80 and 4,990.29 is: 7,485.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,386.02 : 18,578.80 = 4,990.29 : x
  2. Step 2: Convert to fraction form
    12,386.02/18,578.80 = 4,990.29/x
  3. Step 3: Cross multiply
    12,386.02x = 18,578.80 × 4,990.29
  4. Step 4: Simplify right side
    12,386.02x = 92,713,599.85
  5. Step 5: Solve for x
    x = 92,713,599.85/12,386.02
  6. Step 6: Final answer
    x = 7,485.34

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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.