Home / 15,355.02-21,187.99-8,980.35

Finding the Fourth Proportional to 15,355.02, 21,187.99 and 8,980.35

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Solution

The fourth proportional to 15,355.02, 21,187.99 and 8,980.35 is: 12,391.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.02 : 21,187.99 = 8,980.35 : x
  2. Step 2: Convert to fraction form
    15,355.02/21,187.99 = 8,980.35/x
  3. Step 3: Cross multiply
    15,355.02x = 21,187.99 × 8,980.35
  4. Step 4: Simplify right side
    15,355.02x = 190,275,528.06
  5. Step 5: Solve for x
    x = 190,275,528.06/15,355.02
  6. Step 6: Final answer
    x = 12,391.75

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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.