Home / 26,531.79-39,783.99-7,809.40

Finding the Fourth Proportional to 26,531.79, 39,783.99 and 7,809.40

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Solution

The fourth proportional to 26,531.79, 39,783.99 and 7,809.40 is: 11,710.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,531.79 : 39,783.99 = 7,809.40 : x
  2. Step 2: Convert to fraction form
    26,531.79/39,783.99 = 7,809.40/x
  3. Step 3: Cross multiply
    26,531.79x = 39,783.99 × 7,809.40
  4. Step 4: Simplify right side
    26,531.79x = 310,689,091.51
  5. Step 5: Solve for x
    x = 310,689,091.51/26,531.79
  6. Step 6: Final answer
    x = 11,710.07

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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.