Home / 20,698,632.12-31,013,624.82-12,587,071.02

Finding the Fourth Proportional to 20,698,632.12, 31,013,624.82 and 12,587,071.02

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Solution

The fourth proportional to 20,698,632.12, 31,013,624.82 and 12,587,071.02 is: 18,859,734.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698,632.12 : 31,013,624.82 = 12,587,071.02 : x
  2. Step 2: Convert to fraction form
    20,698,632.12/31,013,624.82 = 12,587,071.02/x
  3. Step 3: Cross multiply
    20,698,632.12x = 31,013,624.82 × 12,587,071.02
  4. Step 4: Simplify right side
    20,698,632.12x = 390,370,698,196,974.69
  5. Step 5: Solve for x
    x = 390,370,698,196,974.69/20,698,632.12
  6. Step 6: Final answer
    x = 18,859,734.11

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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.