Home / 12,139,938.20-18,209,907.30-12,069,079.40

Finding the Fourth Proportional to 12,139,938.20, 18,209,907.30 and 12,069,079.40

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Solution

The fourth proportional to 12,139,938.20, 18,209,907.30 and 12,069,079.40 is: 18,103,619.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139,938.20 : 18,209,907.30 = 12,069,079.40 : x
  2. Step 2: Convert to fraction form
    12,139,938.20/18,209,907.30 = 12,069,079.40/x
  3. Step 3: Cross multiply
    12,139,938.20x = 18,209,907.30 × 12,069,079.40
  4. Step 4: Simplify right side
    12,139,938.20x = 219,776,817,070,339.62
  5. Step 5: Solve for x
    x = 219,776,817,070,339.62/12,139,938.20
  6. Step 6: Final answer
    x = 18,103,619.10

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1.5x scale

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.