Home / 28,172,467.80-42,258,701.70-21,787,302.60

Finding the Fourth Proportional to 28,172,467.80, 42,258,701.70 and 21,787,302.60

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Solution

The fourth proportional to 28,172,467.80, 42,258,701.70 and 21,787,302.60 is: 32,680,953.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172,467.80 : 42,258,701.70 = 21,787,302.60 : x
  2. Step 2: Convert to fraction form
    28,172,467.80/42,258,701.70 = 21,787,302.60/x
  3. Step 3: Cross multiply
    28,172,467.80x = 42,258,701.70 × 21,787,302.60
  4. Step 4: Simplify right side
    28,172,467.80x = 920,703,121,421,034.50
  5. Step 5: Solve for x
    x = 920,703,121,421,034.50/28,172,467.80
  6. Step 6: Final answer
    x = 32,680,953.90

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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.