Home / 18,875.50-28,288.64-7,771.01

Finding the Fourth Proportional to 18,875.50, 28,288.64 and 7,771.01

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Solution

The fourth proportional to 18,875.50, 28,288.64 and 7,771.01 is: 11,646.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.50 : 28,288.64 = 7,771.01 : x
  2. Step 2: Convert to fraction form
    18,875.50/28,288.64 = 7,771.01/x
  3. Step 3: Cross multiply
    18,875.50x = 28,288.64 × 7,771.01
  4. Step 4: Simplify right side
    18,875.50x = 219,831,124.03
  5. Step 5: Solve for x
    x = 219,831,124.03/18,875.50
  6. Step 6: Final answer
    x = 11,646.38

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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.