Home / 15,513.80-21,408.43-8,440.07

Finding the Fourth Proportional to 15,513.80, 21,408.43 and 8,440.07

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Solution

The fourth proportional to 15,513.80, 21,408.43 and 8,440.07 is: 11,646.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.80 : 21,408.43 = 8,440.07 : x
  2. Step 2: Convert to fraction form
    15,513.80/21,408.43 = 8,440.07/x
  3. Step 3: Cross multiply
    15,513.80x = 21,408.43 × 8,440.07
  4. Step 4: Simplify right side
    15,513.80x = 180,688,647.79
  5. Step 5: Solve for x
    x = 180,688,647.79/15,513.80
  6. Step 6: Final answer
    x = 11,646.96

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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.