Home / 20,111,820.80-30,167,731.20-12,931,462.40

Finding the Fourth Proportional to 20,111,820.80, 30,167,731.20 and 12,931,462.40

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Solution

The fourth proportional to 20,111,820.80, 30,167,731.20 and 12,931,462.40 is: 19,397,193.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111,820.80 : 30,167,731.20 = 12,931,462.40 : x
  2. Step 2: Convert to fraction form
    20,111,820.80/30,167,731.20 = 12,931,462.40/x
  3. Step 3: Cross multiply
    20,111,820.80x = 30,167,731.20 × 12,931,462.40
  4. Step 4: Simplify right side
    20,111,820.80x = 390,112,881,706,106.88
  5. Step 5: Solve for x
    x = 390,112,881,706,106.88/20,111,820.80
  6. Step 6: Final answer
    x = 19,397,193.60

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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.