Home / 18,969.12-28,466.37-7,875.81

Finding the Fourth Proportional to 18,969.12, 28,466.37 and 7,875.81

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Solution

The fourth proportional to 18,969.12, 28,466.37 and 7,875.81 is: 11,818.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.12 : 28,466.37 = 7,875.81 : x
  2. Step 2: Convert to fraction form
    18,969.12/28,466.37 = 7,875.81/x
  3. Step 3: Cross multiply
    18,969.12x = 28,466.37 × 7,875.81
  4. Step 4: Simplify right side
    18,969.12x = 224,195,721.51
  5. Step 5: Solve for x
    x = 224,195,721.51/18,969.12
  6. Step 6: Final answer
    x = 11,818.98

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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.