Home / 19,320.68-28,981.02-8,931.08

Finding the Fourth Proportional to 19,320.68, 28,981.02 and 8,931.08

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Solution

The fourth proportional to 19,320.68, 28,981.02 and 8,931.08 is: 13,396.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,320.68 : 28,981.02 = 8,931.08 : x
  2. Step 2: Convert to fraction form
    19,320.68/28,981.02 = 8,931.08/x
  3. Step 3: Cross multiply
    19,320.68x = 28,981.02 × 8,931.08
  4. Step 4: Simplify right side
    19,320.68x = 258,831,808.10
  5. Step 5: Solve for x
    x = 258,831,808.10/19,320.68
  6. Step 6: Final answer
    x = 13,396.62

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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.