Home / 13,294.80-18,345.60-7,628.40

Finding the Fourth Proportional to 13,294.80, 18,345.60 and 7,628.40

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Solution

The fourth proportional to 13,294.80, 18,345.60 and 7,628.40 is: 10,526.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,294.80 : 18,345.60 = 7,628.40 : x
  2. Step 2: Convert to fraction form
    13,294.80/18,345.60 = 7,628.40/x
  3. Step 3: Cross multiply
    13,294.80x = 18,345.60 × 7,628.40
  4. Step 4: Simplify right side
    13,294.80x = 139,947,575.04
  5. Step 5: Solve for x
    x = 139,947,575.04/13,294.80
  6. Step 6: Final answer
    x = 10,526.49

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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.