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Finding the Fourth Proportional to 28,637.55, 42,946.03 and 9,912.50

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Solution

The fourth proportional to 28,637.55, 42,946.03 and 9,912.50 is: 14,865.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,637.55 : 42,946.03 = 9,912.50 : x
  2. Step 2: Convert to fraction form
    28,637.55/42,946.03 = 9,912.50/x
  3. Step 3: Cross multiply
    28,637.55x = 42,946.03 × 9,912.50
  4. Step 4: Simplify right side
    28,637.55x = 425,702,472.81
  5. Step 5: Solve for x
    x = 425,702,472.81/28,637.55
  6. Step 6: Final answer
    x = 14,865.18

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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.