Home / 13,430.48-18,534.02-8,123.76

Finding the Fourth Proportional to 13,430.48, 18,534.02 and 8,123.76

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Solution

The fourth proportional to 13,430.48, 18,534.02 and 8,123.76 is: 11,210.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.48 : 18,534.02 = 8,123.76 : x
  2. Step 2: Convert to fraction form
    13,430.48/18,534.02 = 8,123.76/x
  3. Step 3: Cross multiply
    13,430.48x = 18,534.02 × 8,123.76
  4. Step 4: Simplify right side
    13,430.48x = 150,565,889.70
  5. Step 5: Solve for x
    x = 150,565,889.70/13,430.48
  6. Step 6: Final answer
    x = 11,210.76

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1.5x scale

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.