Home / 20,931.04-31,384.74-6,887.28

Finding the Fourth Proportional to 20,931.04, 31,384.74 and 6,887.28

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Solution

The fourth proportional to 20,931.04, 31,384.74 and 6,887.28 is: 10,327.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.04 : 31,384.74 = 6,887.28 : x
  2. Step 2: Convert to fraction form
    20,931.04/31,384.74 = 6,887.28/x
  3. Step 3: Cross multiply
    20,931.04x = 31,384.74 × 6,887.28
  4. Step 4: Simplify right side
    20,931.04x = 216,155,492.11
  5. Step 5: Solve for x
    x = 216,155,492.11/20,931.04
  6. Step 6: Final answer
    x = 10,327.03

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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.