Home / 20,913.51-31,382.51-7,774.95

Finding the Fourth Proportional to 20,913.51, 31,382.51 and 7,774.95

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Solution

The fourth proportional to 20,913.51, 31,382.51 and 7,774.95 is: 11,666.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.51 : 31,382.51 = 7,774.95 : x
  2. Step 2: Convert to fraction form
    20,913.51/31,382.51 = 7,774.95/x
  3. Step 3: Cross multiply
    20,913.51x = 31,382.51 × 7,774.95
  4. Step 4: Simplify right side
    20,913.51x = 243,997,407.25
  5. Step 5: Solve for x
    x = 243,997,407.25/20,913.51
  6. Step 6: Final answer
    x = 11,666.98

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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.