Home / 21,386,912.20-32,080,368.30-12,316,985.80

Finding the Fourth Proportional to 21,386,912.20, 32,080,368.30 and 12,316,985.80

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Solution

The fourth proportional to 21,386,912.20, 32,080,368.30 and 12,316,985.80 is: 18,475,478.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,386,912.20 : 32,080,368.30 = 12,316,985.80 : x
  2. Step 2: Convert to fraction form
    21,386,912.20/32,080,368.30 = 12,316,985.80/x
  3. Step 3: Cross multiply
    21,386,912.20x = 32,080,368.30 × 12,316,985.80
  4. Step 4: Simplify right side
    21,386,912.20x = 395,133,440,809,870.19
  5. Step 5: Solve for x
    x = 395,133,440,809,870.19/21,386,912.20
  6. Step 6: Final answer
    x = 18,475,478.70

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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.