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Finding the Fourth Proportional to 15,871.40, 23,807.10 and 4,779.80

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Solution

The fourth proportional to 15,871.40, 23,807.10 and 4,779.80 is: 7,169.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,871.40 : 23,807.10 = 4,779.80 : x
  2. Step 2: Convert to fraction form
    15,871.40/23,807.10 = 4,779.80/x
  3. Step 3: Cross multiply
    15,871.40x = 23,807.10 × 4,779.80
  4. Step 4: Simplify right side
    15,871.40x = 113,793,176.58
  5. Step 5: Solve for x
    x = 113,793,176.58/15,871.40
  6. Step 6: Final answer
    x = 7,169.70

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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.