Home / 21,009,535.50-28,995,387.87-12,315,013.02

Finding the Fourth Proportional to 21,009,535.50, 28,995,387.87 and 12,315,013.02

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Solution

The fourth proportional to 21,009,535.50, 28,995,387.87 and 12,315,013.02 is: 16,996,024.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009,535.50 : 28,995,387.87 = 12,315,013.02 : x
  2. Step 2: Convert to fraction form
    21,009,535.50/28,995,387.87 = 12,315,013.02/x
  3. Step 3: Cross multiply
    21,009,535.50x = 28,995,387.87 × 12,315,013.02
  4. Step 4: Simplify right side
    21,009,535.50x = 357,078,579,139,000.06
  5. Step 5: Solve for x
    x = 357,078,579,139,000.06/21,009,535.50
  6. Step 6: Final answer
    x = 16,996,024.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.