Home / 13,430.84-18,528.81-8,391.62

Finding the Fourth Proportional to 13,430.84, 18,528.81 and 8,391.62

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Solution

The fourth proportional to 13,430.84, 18,528.81 and 8,391.62 is: 11,576.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.84 : 18,528.81 = 8,391.62 : x
  2. Step 2: Convert to fraction form
    13,430.84/18,528.81 = 8,391.62/x
  3. Step 3: Cross multiply
    13,430.84x = 18,528.81 × 8,391.62
  4. Step 4: Simplify right side
    13,430.84x = 155,486,690.61
  5. Step 5: Solve for x
    x = 155,486,690.61/13,430.84
  6. Step 6: Final answer
    x = 11,576.84

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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.