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Finding the Fourth Proportional to 28,430.43, 42,655.08 and 8,709.18

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Solution

The fourth proportional to 28,430.43, 42,655.08 and 8,709.18 is: 13,066.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.43 : 42,655.08 = 8,709.18 : x
  2. Step 2: Convert to fraction form
    28,430.43/42,655.08 = 8,709.18/x
  3. Step 3: Cross multiply
    28,430.43x = 42,655.08 × 8,709.18
  4. Step 4: Simplify right side
    28,430.43x = 371,490,769.63
  5. Step 5: Solve for x
    x = 371,490,769.63/28,430.43
  6. Step 6: Final answer
    x = 13,066.66

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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.