Home / 12,528,030.60-18,792,045.90-7,720,129.80

Finding the Fourth Proportional to 12,528,030.60, 18,792,045.90 and 7,720,129.80

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Solution

The fourth proportional to 12,528,030.60, 18,792,045.90 and 7,720,129.80 is: 11,580,194.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,528,030.60 : 18,792,045.90 = 7,720,129.80 : x
  2. Step 2: Convert to fraction form
    12,528,030.60/18,792,045.90 = 7,720,129.80/x
  3. Step 3: Cross multiply
    12,528,030.60x = 18,792,045.90 × 7,720,129.80
  4. Step 4: Simplify right side
    12,528,030.60x = 145,077,033,555,557.81
  5. Step 5: Solve for x
    x = 145,077,033,555,557.81/12,528,030.60
  6. Step 6: Final answer
    x = 11,580,194.70

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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.