Home / 15,226.80-21,070.44-12,985.08

Finding the Fourth Proportional to 15,226.80, 21,070.44 and 12,985.08

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Solution

The fourth proportional to 15,226.80, 21,070.44 and 12,985.08 is: 17,968.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,226.80 : 21,070.44 = 12,985.08 : x
  2. Step 2: Convert to fraction form
    15,226.80/21,070.44 = 12,985.08/x
  3. Step 3: Cross multiply
    15,226.80x = 21,070.44 × 12,985.08
  4. Step 4: Simplify right side
    15,226.80x = 273,601,349.04
  5. Step 5: Solve for x
    x = 273,601,349.04/15,226.80
  6. Step 6: Final answer
    x = 17,968.41

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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.