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Finding the Fourth Proportional to 51,403.88, 70,931.12 and 28,430.60

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Solution

The fourth proportional to 51,403.88, 70,931.12 and 28,430.60 is: 39,230.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,403.88 : 70,931.12 = 28,430.60 : x
  2. Step 2: Convert to fraction form
    51,403.88/70,931.12 = 28,430.60/x
  3. Step 3: Cross multiply
    51,403.88x = 70,931.12 × 28,430.60
  4. Step 4: Simplify right side
    51,403.88x = 2,016,613,803.46
  5. Step 5: Solve for x
    x = 2,016,613,803.46/51,403.88
  6. Step 6: Final answer
    x = 39,230.77

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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.