Home / 13,137.04-18,127.88-7,830.80

Finding the Fourth Proportional to 13,137.04, 18,127.88 and 7,830.80

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Solution

The fourth proportional to 13,137.04, 18,127.88 and 7,830.80 is: 10,805.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.04 : 18,127.88 = 7,830.80 : x
  2. Step 2: Convert to fraction form
    13,137.04/18,127.88 = 7,830.80/x
  3. Step 3: Cross multiply
    13,137.04x = 18,127.88 × 7,830.80
  4. Step 4: Simplify right side
    13,137.04x = 141,955,802.70
  5. Step 5: Solve for x
    x = 141,955,802.70/13,137.04
  6. Step 6: Final answer
    x = 10,805.77

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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.