Home / 18,721.53-28,089.59-8,869.10

Finding the Fourth Proportional to 18,721.53, 28,089.59 and 8,869.10

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Solution

The fourth proportional to 18,721.53, 28,089.59 and 8,869.10 is: 13,307.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.53 : 28,089.59 = 8,869.10 : x
  2. Step 2: Convert to fraction form
    18,721.53/28,089.59 = 8,869.10/x
  3. Step 3: Cross multiply
    18,721.53x = 28,089.59 × 8,869.10
  4. Step 4: Simplify right side
    18,721.53x = 249,129,197.88
  5. Step 5: Solve for x
    x = 249,129,197.88/18,721.53
  6. Step 6: Final answer
    x = 13,307.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.