Home / 18,938.96-26,135.30-10,980.72

Finding the Fourth Proportional to 18,938.96, 26,135.30 and 10,980.72

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Solution

The fourth proportional to 18,938.96, 26,135.30 and 10,980.72 is: 15,153.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,938.96 : 26,135.30 = 10,980.72 : x
  2. Step 2: Convert to fraction form
    18,938.96/26,135.30 = 10,980.72/x
  3. Step 3: Cross multiply
    18,938.96x = 26,135.30 × 10,980.72
  4. Step 4: Simplify right side
    18,938.96x = 286,984,411.42
  5. Step 5: Solve for x
    x = 286,984,411.42/18,938.96
  6. Step 6: Final answer
    x = 15,153.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.