Home / 20,905.08-31,341.18-14,311.28

Finding the Fourth Proportional to 20,905.08, 31,341.18 and 14,311.28

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Solution

The fourth proportional to 20,905.08, 31,341.18 and 14,311.28 is: 21,455.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.08 : 31,341.18 = 14,311.28 : x
  2. Step 2: Convert to fraction form
    20,905.08/31,341.18 = 14,311.28/x
  3. Step 3: Cross multiply
    20,905.08x = 31,341.18 × 14,311.28
  4. Step 4: Simplify right side
    20,905.08x = 448,532,402.51
  5. Step 5: Solve for x
    x = 448,532,402.51/20,905.08
  6. Step 6: Final answer
    x = 21,455.67

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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.