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Finding the Fourth Proportional to 39,714.40, 59,488.80 and 18,672.40

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Solution

The fourth proportional to 39,714.40, 59,488.80 and 18,672.40 is: 27,969.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,714.40 : 59,488.80 = 18,672.40 : x
  2. Step 2: Convert to fraction form
    39,714.40/59,488.80 = 18,672.40/x
  3. Step 3: Cross multiply
    39,714.40x = 59,488.80 × 18,672.40
  4. Step 4: Simplify right side
    39,714.40x = 1,110,798,669.12
  5. Step 5: Solve for x
    x = 1,110,798,669.12/39,714.40
  6. Step 6: Final answer
    x = 27,969.67

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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.