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Finding the Fourth Proportional to 12,402,430.80, 18,561,655.80 and 10,890,776.40

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Solution

The fourth proportional to 12,402,430.80, 18,561,655.80 and 10,890,776.40 is: 16,299,292.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,402,430.80 : 18,561,655.80 = 10,890,776.40 : x
  2. Step 2: Convert to fraction form
    12,402,430.80/18,561,655.80 = 10,890,776.40/x
  3. Step 3: Cross multiply
    12,402,430.80x = 18,561,655.80 × 10,890,776.40
  4. Step 4: Simplify right side
    12,402,430.80x = 202,150,842,931,563.12
  5. Step 5: Solve for x
    x = 202,150,842,931,563.12/12,402,430.80
  6. Step 6: Final answer
    x = 16,299,292.15

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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.