Home / 51,931.40-77,897.05-12,488.50

Finding the Fourth Proportional to 51,931.40, 77,897.05 and 12,488.50

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Solution

The fourth proportional to 51,931.40, 77,897.05 and 12,488.50 is: 18,732.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,931.40 : 77,897.05 = 12,488.50 : x
  2. Step 2: Convert to fraction form
    51,931.40/77,897.05 = 12,488.50/x
  3. Step 3: Cross multiply
    51,931.40x = 77,897.05 × 12,488.50
  4. Step 4: Simplify right side
    51,931.40x = 972,817,308.93
  5. Step 5: Solve for x
    x = 972,817,308.93/51,931.40
  6. Step 6: Final answer
    x = 18,732.74

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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.