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Finding the Fourth Proportional to 28,698.60, 42,926.40 and 25,758.30

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Solution

The fourth proportional to 28,698.60, 42,926.40 and 25,758.30 is: 38,528.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,698.60 : 42,926.40 = 25,758.30 : x
  2. Step 2: Convert to fraction form
    28,698.60/42,926.40 = 25,758.30/x
  3. Step 3: Cross multiply
    28,698.60x = 42,926.40 × 25,758.30
  4. Step 4: Simplify right side
    28,698.60x = 1,105,711,089.12
  5. Step 5: Solve for x
    x = 1,105,711,089.12/28,698.60
  6. Step 6: Final answer
    x = 38,528.40

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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.