Home / 19,931,863.80-29,897,795.70-12,721,980.90

Finding the Fourth Proportional to 19,931,863.80, 29,897,795.70 and 12,721,980.90

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Solution

The fourth proportional to 19,931,863.80, 29,897,795.70 and 12,721,980.90 is: 19,082,971.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931,863.80 : 29,897,795.70 = 12,721,980.90 : x
  2. Step 2: Convert to fraction form
    19,931,863.80/29,897,795.70 = 12,721,980.90/x
  3. Step 3: Cross multiply
    19,931,863.80x = 29,897,795.70 × 12,721,980.90
  4. Step 4: Simplify right side
    19,931,863.80x = 380,359,185,847,502.12
  5. Step 5: Solve for x
    x = 380,359,185,847,502.12/19,931,863.80
  6. Step 6: Final answer
    x = 19,082,971.35

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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.