Finding the Fourth Proportional to 12,128,424.80, 18,192,637.20 and 8,709,487.70
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Solution
The fourth proportional to 12,128,424.80, 18,192,637.20 and 8,709,487.70 is: 13,064,231.55
Step by Step Solution
- Step 1: Write the proportion equation
12,128,424.80 : 18,192,637.20 = 8,709,487.70 : x - Step 2: Convert to fraction form
12,128,424.80/18,192,637.20 = 8,709,487.70/x - Step 3: Cross multiply
12,128,424.80x = 18,192,637.20 × 8,709,487.70 - Step 4: Simplify right side
12,128,424.80x = 158,448,549,923,962.41 - Step 5: Solve for x
x = 158,448,549,923,962.41/12,128,424.80 - Step 6: Final answer
x = 13,064,231.55
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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.