Home / 20,887.04-31,330.56-10,491.50

Finding the Fourth Proportional to 20,887.04, 31,330.56 and 10,491.50

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Solution

The fourth proportional to 20,887.04, 31,330.56 and 10,491.50 is: 15,737.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.04 : 31,330.56 = 10,491.50 : x
  2. Step 2: Convert to fraction form
    20,887.04/31,330.56 = 10,491.50/x
  3. Step 3: Cross multiply
    20,887.04x = 31,330.56 × 10,491.50
  4. Step 4: Simplify right side
    20,887.04x = 328,704,570.24
  5. Step 5: Solve for x
    x = 328,704,570.24/20,887.04
  6. Step 6: Final answer
    x = 15,737.25

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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.