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Finding the Fourth Proportional to 38,595.88, 53,262.31 and 20,931.88

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Solution

The fourth proportional to 38,595.88, 53,262.31 and 20,931.88 is: 28,885.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,595.88 : 53,262.31 = 20,931.88 : x
  2. Step 2: Convert to fraction form
    38,595.88/53,262.31 = 20,931.88/x
  3. Step 3: Cross multiply
    38,595.88x = 53,262.31 × 20,931.88
  4. Step 4: Simplify right side
    38,595.88x = 1,114,880,015.13
  5. Step 5: Solve for x
    x = 1,114,880,015.13/38,595.88
  6. Step 6: Final answer
    x = 28,885.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.