Home / 15,922.80-23,855.40-12,985.20

Finding the Fourth Proportional to 15,922.80, 23,855.40 and 12,985.20

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Solution

The fourth proportional to 15,922.80, 23,855.40 and 12,985.20 is: 19,454.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,922.80 : 23,855.40 = 12,985.20 : x
  2. Step 2: Convert to fraction form
    15,922.80/23,855.40 = 12,985.20/x
  3. Step 3: Cross multiply
    15,922.80x = 23,855.40 × 12,985.20
  4. Step 4: Simplify right side
    15,922.80x = 309,767,140.08
  5. Step 5: Solve for x
    x = 309,767,140.08/15,922.80
  6. Step 6: Final answer
    x = 19,454.31

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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.