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Finding the Fourth Proportional to 12,547,808.80, 18,821,324.40 and 3,572,360.80

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Solution

The fourth proportional to 12,547,808.80, 18,821,324.40 and 3,572,360.80 is: 5,358,430.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,547,808.80 : 18,821,324.40 = 3,572,360.80 : x
  2. Step 2: Convert to fraction form
    12,547,808.80/18,821,324.40 = 3,572,360.80/x
  3. Step 3: Cross multiply
    12,547,808.80x = 18,821,324.40 × 3,572,360.80
  4. Step 4: Simplify right side
    12,547,808.80x = 67,236,561,490,643.51
  5. Step 5: Solve for x
    x = 67,236,561,490,643.51/12,547,808.80
  6. Step 6: Final answer
    x = 5,358,430.51

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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.