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Finding the Fourth Proportional to 31,457.60, 47,186.40 and 12,737.60

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Solution

The fourth proportional to 31,457.60, 47,186.40 and 12,737.60 is: 19,106.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,457.60 : 47,186.40 = 12,737.60 : x
  2. Step 2: Convert to fraction form
    31,457.60/47,186.40 = 12,737.60/x
  3. Step 3: Cross multiply
    31,457.60x = 47,186.40 × 12,737.60
  4. Step 4: Simplify right side
    31,457.60x = 601,041,488.64
  5. Step 5: Solve for x
    x = 601,041,488.64/31,457.60
  6. Step 6: Final answer
    x = 19,106.40

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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.