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Finding the Fourth Proportional to 58,312.69, 87,459.66 and 20,865.79

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Solution

The fourth proportional to 58,312.69, 87,459.66 and 20,865.79 is: 31,295.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,312.69 : 87,459.66 = 20,865.79 : x
  2. Step 2: Convert to fraction form
    58,312.69/87,459.66 = 20,865.79/x
  3. Step 3: Cross multiply
    58,312.69x = 87,459.66 × 20,865.79
  4. Step 4: Simplify right side
    58,312.69x = 1,824,914,899.03
  5. Step 5: Solve for x
    x = 1,824,914,899.03/58,312.69
  6. Step 6: Final answer
    x = 31,295.33

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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.