Home / 15,320.71-21,143.08-8,607.53

Finding the Fourth Proportional to 15,320.71, 21,143.08 and 8,607.53

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Solution

The fourth proportional to 15,320.71, 21,143.08 and 8,607.53 is: 11,878.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.71 : 21,143.08 = 8,607.53 : x
  2. Step 2: Convert to fraction form
    15,320.71/21,143.08 = 8,607.53/x
  3. Step 3: Cross multiply
    15,320.71x = 21,143.08 × 8,607.53
  4. Step 4: Simplify right side
    15,320.71x = 181,989,759.01
  5. Step 5: Solve for x
    x = 181,989,759.01/15,320.71
  6. Step 6: Final answer
    x = 11,878.68

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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.