Home / 18,875.85-28,317.75-7,782.45

Finding the Fourth Proportional to 18,875.85, 28,317.75 and 7,782.45

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Solution

The fourth proportional to 18,875.85, 28,317.75 and 7,782.45 is: 11,675.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.85 : 28,317.75 = 7,782.45 : x
  2. Step 2: Convert to fraction form
    18,875.85/28,317.75 = 7,782.45/x
  3. Step 3: Cross multiply
    18,875.85x = 28,317.75 × 7,782.45
  4. Step 4: Simplify right side
    18,875.85x = 220,381,473.49
  5. Step 5: Solve for x
    x = 220,381,473.49/18,875.85
  6. Step 6: Final answer
    x = 11,675.31

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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.