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Finding the Fourth Proportional to 35,428.80, 53,143.20 and 15,686.40

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Solution

The fourth proportional to 35,428.80, 53,143.20 and 15,686.40 is: 23,529.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,428.80 : 53,143.20 = 15,686.40 : x
  2. Step 2: Convert to fraction form
    35,428.80/53,143.20 = 15,686.40/x
  3. Step 3: Cross multiply
    35,428.80x = 53,143.20 × 15,686.40
  4. Step 4: Simplify right side
    35,428.80x = 833,625,492.48
  5. Step 5: Solve for x
    x = 833,625,492.48/35,428.80
  6. Step 6: Final answer
    x = 23,529.60

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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.