Home / 13,639.16-18,740.47-10,839.80

Finding the Fourth Proportional to 13,639.16, 18,740.47 and 10,839.80

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Solution

The fourth proportional to 13,639.16, 18,740.47 and 10,839.80 is: 14,894.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.16 : 18,740.47 = 10,839.80 : x
  2. Step 2: Convert to fraction form
    13,639.16/18,740.47 = 10,839.80/x
  3. Step 3: Cross multiply
    13,639.16x = 18,740.47 × 10,839.80
  4. Step 4: Simplify right side
    13,639.16x = 203,142,946.71
  5. Step 5: Solve for x
    x = 203,142,946.71/13,639.16
  6. Step 6: Final answer
    x = 14,894.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.