Home / 20,719,820.40-31,079,730.60-12,657,663.60

Finding the Fourth Proportional to 20,719,820.40, 31,079,730.60 and 12,657,663.60

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Solution

The fourth proportional to 20,719,820.40, 31,079,730.60 and 12,657,663.60 is: 18,986,495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719,820.40 : 31,079,730.60 = 12,657,663.60 : x
  2. Step 2: Convert to fraction form
    20,719,820.40/31,079,730.60 = 12,657,663.60/x
  3. Step 3: Cross multiply
    20,719,820.40x = 31,079,730.60 × 12,657,663.60
  4. Step 4: Simplify right side
    20,719,820.40x = 393,396,774,713,426.19
  5. Step 5: Solve for x
    x = 393,396,774,713,426.19/20,719,820.40
  6. Step 6: Final answer
    x = 18,986,495.40

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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.