Home / 20,876.40-31,312.44-19,658.16

Finding the Fourth Proportional to 20,876.40, 31,312.44 and 19,658.16

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Solution

The fourth proportional to 20,876.40, 31,312.44 and 19,658.16 is: 29,485.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.40 : 31,312.44 = 19,658.16 : x
  2. Step 2: Convert to fraction form
    20,876.40/31,312.44 = 19,658.16/x
  3. Step 3: Cross multiply
    20,876.40x = 31,312.44 × 19,658.16
  4. Step 4: Simplify right side
    20,876.40x = 615,544,955.51
  5. Step 5: Solve for x
    x = 615,544,955.51/20,876.40
  6. Step 6: Final answer
    x = 29,485.21

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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.