Home / 28,395.12-42,607.08-12,809.28

Finding the Fourth Proportional to 28,395.12, 42,607.08 and 12,809.28

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Solution

The fourth proportional to 28,395.12, 42,607.08 and 12,809.28 is: 19,220.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,395.12 : 42,607.08 = 12,809.28 : x
  2. Step 2: Convert to fraction form
    28,395.12/42,607.08 = 12,809.28/x
  3. Step 3: Cross multiply
    28,395.12x = 42,607.08 × 12,809.28
  4. Step 4: Simplify right side
    28,395.12x = 545,766,017.70
  5. Step 5: Solve for x
    x = 545,766,017.70/28,395.12
  6. Step 6: Final answer
    x = 19,220.42

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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.