Home / 7,345.40-10,136.61-3,988.19

Finding the Fourth Proportional to 7,345.40, 10,136.61 and 3,988.19

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Solution

The fourth proportional to 7,345.40, 10,136.61 and 3,988.19 is: 5,503.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,345.40 : 10,136.61 = 3,988.19 : x
  2. Step 2: Convert to fraction form
    7,345.40/10,136.61 = 3,988.19/x
  3. Step 3: Cross multiply
    7,345.40x = 10,136.61 × 3,988.19
  4. Step 4: Simplify right side
    7,345.40x = 40,426,675.95
  5. Step 5: Solve for x
    x = 40,426,675.95/7,345.40
  6. Step 6: Final answer
    x = 5,503.68

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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.