Home / 10,305.63-15,430.77-8,478.81

Finding the Fourth Proportional to 10,305.63, 15,430.77 and 8,478.81

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Solution

The fourth proportional to 10,305.63, 15,430.77 and 8,478.81 is: 12,695.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,305.63 : 15,430.77 = 8,478.81 : x
  2. Step 2: Convert to fraction form
    10,305.63/15,430.77 = 8,478.81/x
  3. Step 3: Cross multiply
    10,305.63x = 15,430.77 × 8,478.81
  4. Step 4: Simplify right side
    10,305.63x = 130,834,566.98
  5. Step 5: Solve for x
    x = 130,834,566.98/10,305.63
  6. Step 6: Final answer
    x = 12,695.45

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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.