Home / 13,731.04-18,948.69-7,681.20

Finding the Fourth Proportional to 13,731.04, 18,948.69 and 7,681.20

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Solution

The fourth proportional to 13,731.04, 18,948.69 and 7,681.20 is: 10,599.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.04 : 18,948.69 = 7,681.20 : x
  2. Step 2: Convert to fraction form
    13,731.04/18,948.69 = 7,681.20/x
  3. Step 3: Cross multiply
    13,731.04x = 18,948.69 × 7,681.20
  4. Step 4: Simplify right side
    13,731.04x = 145,548,677.63
  5. Step 5: Solve for x
    x = 145,548,677.63/13,731.04
  6. Step 6: Final answer
    x = 10,599.98

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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.